1620690925392 has 1440 divisors, whose sum is σ = 6173193461760. Its totient is φ = 391862016000.

The previous prime is 1620690925379. The next prime is 1620690925397. The reversal of 1620690925392 is 2935290960261.

It is a happy number.

1620690925392 is a `hidden beast` number, since 1 + 620 + 6 + 9 + 0 + 9 + 2 + 5 + 3 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620690925397) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 9054139159 + ... + 9054139337.

It is an arithmetic number, because the mean of its divisors is an integer number (4286939904).

Almost surely, 2^{1620690925392} is an apocalyptic number.

1620690925392 is a gapful number since it is divisible by the number (12) 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 1620690925392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3086596730880).

1620690925392 is an abundant number, since it is smaller than the sum of its proper divisors (4552502536368).

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

1620690925392 is a wasteful number, since it uses less digits than its factorization.

1620690925392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 1620690925392 in words is "one trillion, six hundred twenty billion, six hundred ninety million, nine hundred twenty-five thousand, three hundred ninety-two".