161059215400 has 48 divisors (see below), whose sum is σ = 374684126940. Its totient is φ = 64385587200.

The previous prime is 161059215337. The next prime is 161059215433. The reversal of 161059215400 is 4512950161.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 55508302404 + 105550912996 = 235602^2 + 324886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102130 + ... + 576670.

Almost surely, 2^161059215400 is an apocalyptic number.

161059215400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161059215400 is an abundant number, since it is smaller than the sum of its proper divisors (213624911540).

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

161059215400 is a wasteful number, since it uses less digits than its factorization.

161059215400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476254 (or 476245 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 161059215400 in words is "one hundred sixty-one billion, fifty-nine million, two hundred fifteen thousand, four hundred".