30977657138 has 16 divisors (see below), whose sum is σ = 46643905536. Its totient is φ = 15429720240.

The previous prime is 30977657131. The next prime is 30977657147. The reversal of 30977657138 is 83175677903.

It is not an unprimeable number, because it can be changed into a prime (30977657131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058703 + ... + 3068813.

It is an arithmetic number, because the mean of its divisors is an integer number (2915244096).

Almost surely, 2^30977657138 is an apocalyptic number.

30977657138 is a deficient number, since it is larger than the sum of its proper divisors (15666248398).

30977657138 is a wasteful number, since it uses less digits than its factorization.

30977657138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15809.

The product of its (nonzero) digits is 6667920, while the sum is 56.

The spelling of 30977657138 in words is "thirty billion, nine hundred seventy-seven million, six hundred fifty-seven thousand, one hundred thirty-eight".