13557499693920 has 432 divisors, whose sum is σ = 57254371286112. Its totient is φ = 2860483092480.

The previous prime is 13557499693891. The next prime is 13557499693931. The reversal of 13557499693920 is 2939699475531.

13557499693920 is a `hidden beast` number, since 1 + 3 + 5 + 57 + 499 + 69 + 3 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2275741 + ... + 5682780.

It is an arithmetic number, because the mean of its divisors is an integer number (132533266866).

Almost surely, 2^{13557499693920} is an apocalyptic number.

13557499693920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13557499693920 is an abundant number, since it is smaller than the sum of its proper divisors (43696871592192).

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

13557499693920 is a wasteful number, since it uses less digits than its factorization.

13557499693920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958575 (or 7958551 counting only the distinct ones).

The product of its (nonzero) digits is 496011600, while the sum is 72.

The spelling of 13557499693920 in words is "thirteen trillion, five hundred fifty-seven billion, four hundred ninety-nine million, six hundred ninety-three thousand, nine hundred twenty".