16161540078 has 16 divisors (see below), whose sum is σ = 32326253136. Its totient is φ = 5386651200.

The previous prime is 16161540077. The next prime is 16161540121. The reversal of 16161540078 is 87004516161.

It is a super-2 number, since 2×16161540078² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161540077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63223 + ... + 190578.

It is an arithmetic number, because the mean of its divisors is an integer number (2020390821).

Almost surely, 2^16161540078 is an apocalyptic number.

16161540078 is an abundant number, since it is smaller than the sum of its proper divisors (16164713058).

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

16161540078 is a wasteful number, since it uses less digits than its factorization.

16161540078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264419.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 16161540078 in words is "sixteen billion, one hundred sixty-one million, five hundred forty thousand, seventy-eight".