77955979630 has 8 divisors (see below), whose sum is σ = 140320763352. Its totient is φ = 31182391848.

The previous prime is 77955979601. The next prime is 77955979631. The reversal of 77955979630 is 3697955977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77955979631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3897798972 + ... + 3897798991.

It is an arithmetic number, because the mean of its divisors is an integer number (17540095419).

Almost surely, 2^77955979630 is an apocalyptic number.

77955979630 is a deficient number, since it is larger than the sum of its proper divisors (62364783722).

77955979630 is a wasteful number, since it uses less digits than its factorization.

77955979630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7795597970.

The product of its (nonzero) digits is 112521150, while the sum is 67.

The spelling of 77955979630 in words is "seventy-seven billion, nine hundred fifty-five million, nine hundred seventy-nine thousand, six hundred thirty".