1791927152640 has 520 divisors, whose sum is σ = 6573254303088. Its totient is φ = 466715934720.

The previous prime is 1791927152633. The next prime is 1791927152647. The reversal of 1791927152640 is 462517291971.

1791927152640 is a `hidden beast` number, since 1 + 7 + 9 + 1 + 9 + 2 + 71 + 526 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1791927152633) and next prime (1791927152647).

It is a super-2 number, since 2×1791927152640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791927152647) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71319280 + ... + 71344400.

Almost surely, 2^{1791927152640} is an apocalyptic number.

1791927152640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1791927152640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3286627151544).

1791927152640 is an abundant number, since it is smaller than the sum of its proper divisors (4781327150448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1791927152640 is an equidigital number, since it uses as much as digits as its factorization.

1791927152640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25205 (or 25174 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 1791927152640 in words is "one trillion, seven hundred ninety-one billion, nine hundred twenty-seven million, one hundred fifty-two thousand, six hundred forty".