16320878077 has 32 divisors (see below), whose sum is σ = 20272250880. Its totient is φ = 12827445120.

The previous prime is 16320877987. The next prime is 16320878083. The reversal of 16320878077 is 77087802361.

It is not a de Polignac number, because 16320878077 - 2²³ = 16312489469 is a prime.

It is a super-2 number, since 2×16320878077² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16320878077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320878677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 680748 + ... + 704314.

It is an arithmetic number, because the mean of its divisors is an integer number (633507840).

Almost surely, 2^16320878077 is an apocalyptic number.

It is an amenable number.

16320878077 is a deficient number, since it is larger than the sum of its proper divisors (3951372803).

16320878077 is a wasteful number, since it uses less digits than its factorization.

16320878077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23761.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 16320878077 in words is "sixteen billion, three hundred twenty million, eight hundred seventy-eight thousand, seventy-seven".