64930220372 has 6 divisors (see below), whose sum is σ = 113627885658. Its totient is φ = 32465110184.

The previous prime is 64930220363. The next prime is 64930220429. The reversal of 64930220372 is 27302203946.

It can be written as a sum of positive squares in only one way, i.e., 47914583236 + 17015637136 = 218894^2 + 130444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8116277543 + ... + 8116277550.

It is an arithmetic number, because the mean of its divisors is an integer number (18937980943).

Almost surely, 2^64930220372 is an apocalyptic number.

It is an amenable number.

64930220372 is a deficient number, since it is larger than the sum of its proper divisors (48697665286).

64930220372 is a wasteful number, since it uses less digits than its factorization.

64930220372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16232555097 (or 16232555095 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 64930220372 in words is "sixty-four billion, nine hundred thirty million, two hundred twenty thousand, three hundred seventy-two".