64631266213646 has 32 divisors (see below), whose sum is σ = 111982455666432. Its totient is φ = 27649490060160.

The previous prime is 64631266213621. The next prime is 64631266213669.

64631266213646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64631266213646² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64631266213591 and 64631266213600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44185415 + ... + 45624701.

It is an arithmetic number, because the mean of its divisors is an integer number (3499451739576).

Almost surely, 2^{64631266213646} is an apocalyptic number.

64631266213646 is a deficient number, since it is larger than the sum of its proper divisors (47351189452786).

64631266213646 is a wasteful number, since it uses less digits than its factorization.

64631266213646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559384.

The product of its digits is 26873856, while the sum is 56.

The spelling of 64631266213646 in words is "sixty-four trillion, six hundred thirty-one billion, two hundred sixty-six million, two hundred thirteen thousand, six hundred forty-six".