65497259264 has 18 divisors (see below), whose sum is σ = 130738670370. Its totient is φ = 32748629504.

The previous prime is 65497259171. The next prime is 65497259273. The reversal of 65497259264 is 46295279456.

It can be written as a sum of positive squares in only one way, i.e., 63544326400 + 1952932864 = 252080^2 + 44192^2 .

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, 127924079 + ... + 127924590.

It is an arithmetic number, because the mean of its divisors is an integer number (7263259465).

Almost surely, 2^65497259264 is an apocalyptic number.

65497259264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65497259264 is a deficient number, since it is larger than the sum of its proper divisors (65241411106).

65497259264 is an equidigital number, since it uses as much as digits as its factorization.

65497259264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255848685 (or 255848671 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 59.

The spelling of 65497259264 in words is "sixty-five billion, four hundred ninety-seven million, two hundred fifty-nine thousand, two hundred sixty-four".