77901930906 has 16 divisors (see below), whose sum is σ = 156116100000. Its totient is φ = 25915270608.

The previous prime is 77901930901. The next prime is 77901930907. The reversal of 77901930906 is 60903910977.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77901930901) 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, 13006681 + ... + 13012668.

It is an arithmetic number, because the mean of its divisors is an integer number (9757256250).

Almost surely, 2^77901930906 is an apocalyptic number.

77901930906 is an abundant number, since it is smaller than the sum of its proper divisors (78214169094).

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

77901930906 is a wasteful number, since it uses less digits than its factorization.

77901930906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26019853.

The product of its (nonzero) digits is 642978, while the sum is 51.

The spelling of 77901930906 in words is "seventy-seven billion, nine hundred one million, nine hundred thirty thousand, nine hundred six".