64155381650631 has 12 divisors (see below), whose sum is σ = 92668964714352. Its totient is φ = 42770217460896.

The previous prime is 64155381650611. The next prime is 64155381650677. The reversal of 64155381650631 is 13605618355146.

64155381650631 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 53 + 81 + 6 + 506 + 3 + 1 = 666.

It is not a de Polignac number, because 64155381650631 - 2⁶ = 64155381650567 is a prime.

It is a super-2 number, since 2×64155381650631² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64155381650611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11580630 + ... + 16199436.

It is an arithmetic number, because the mean of its divisors is an integer number (7722413726196).

Almost surely, 2^{64155381650631} is an apocalyptic number.

64155381650631 is a deficient number, since it is larger than the sum of its proper divisors (28513583063721).

64155381650631 is a wasteful number, since it uses less digits than its factorization.

64155381650631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162150 (or 6162147 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 64155381650631 in words is "sixty-four trillion, one hundred fifty-five billion, three hundred eighty-one million, six hundred fifty thousand, six hundred thirty-one".