1551193843680 has 672 divisors, whose sum is σ = 5929130085984. Its totient is φ = 381062320128.

The previous prime is 1551193843657. The next prime is 1551193843681. The reversal of 1551193843680 is 863483911551.

1551193843680 is a `hidden beast` number, since 1 + 5 + 511 + 9 + 3 + 8 + 43 + 6 + 80 = 666.

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 (1551193843681) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1253996022 + ... + 1253997258.

It is an arithmetic number, because the mean of its divisors is an integer number (8823110247).

Almost surely, 2^{1551193843680} is an apocalyptic number.

1551193843680 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 1551193843680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2964565042992).

1551193843680 is an abundant number, since it is smaller than the sum of its proper divisors (4377936242304).

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

1551193843680 is a wasteful number, since it uses less digits than its factorization.

1551193843680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 1551193843680 in words is "one trillion, five hundred fifty-one billion, one hundred ninety-three million, eight hundred forty-three thousand, six hundred eighty".