16161611040 has 72 divisors (see below), whose sum is σ = 55151502588. Its totient is φ = 4309762560.

The previous prime is 16161610991. The next prime is 16161611077. The reversal of 16161611040 is 4011616161.

It is a happy number.

16161611040 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 1 + 611 + 0 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14628418704 + 1533192336 = 120948^2 + 39156^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×16161611040² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16161610995 and 16161611013.

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, 5610231 + ... + 5613110.

Almost surely, 2^16161611040 is an apocalyptic number.

16161611040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16161611040 is an abundant number, since it is smaller than the sum of its proper divisors (38989891548).

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

16161611040 is a wasteful number, since it uses less digits than its factorization.

16161611040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11223362 (or 11223351 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 16161611040 in words is "sixteen billion, one hundred sixty-one million, six hundred eleven thousand, forty".