391052616964 has 27 divisors (see below), whose sum is σ = 690701419317. Its totient is φ = 193725948864.

The previous prime is 391052616953. The next prime is 391052616967. The reversal of 391052616964 is 469616250193.

It is a happy number.

The square root of 391052616964 is 625342.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6890660100 + 384161956864 = 83010^2 + 619808^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391052616967) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 141325909 + ... + 141328675.

Almost surely, 2^391052616964 is an apocalyptic number.

391052616964 is the 625342-nd square number.

It is an amenable number.

391052616964 is a deficient number, since it is larger than the sum of its proper divisors (299648802353).

391052616964 is an frugal number, since it uses more digits than its factorization.

391052616964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764 (or 2882 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 52.

It can be divided in two parts, 391052 and 616964, that added together give a square (1008016 = 1004²).

The spelling of 391052616964 in words is "three hundred ninety-one billion, fifty-two million, six hundred sixteen thousand, nine hundred sixty-four".