16620137543400 has 96 divisors (see below), whose sum is σ = 53762531924160. Its totient is φ = 4239339427840.

The previous prime is 16620137543299. The next prime is 16620137543419. The reversal of 16620137543400 is 434573102661.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 602165097 + ... + 602192696.

It is an arithmetic number, because the mean of its divisors is an integer number (560026374210).

Almost surely, 2^{16620137543400} is an apocalyptic number.

16620137543400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16620137543400 is an abundant number, since it is smaller than the sum of its proper divisors (37142394380760).

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

16620137543400 is a wasteful number, since it uses less digits than its factorization.

16620137543400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204357835 (or 1204357826 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 16620137543400 in words is "sixteen trillion, six hundred twenty billion, one hundred thirty-seven million, five hundred forty-three thousand, four hundred".