64450695631 has 12 divisors (see below), whose sum is σ = 74990371008. Its totient is φ = 55230844032.

The previous prime is 64450695629. The next prime is 64450695653. The reversal of 64450695631 is 13659605446.

It is not a de Polignac number, because 64450695631 - 2¹ = 64450695629 is a prime.

It is a super-2 number, since 2×64450695631² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64450695601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70015 + ... + 365791.

It is an arithmetic number, because the mean of its divisors is an integer number (6249197584).

Almost surely, 2^64450695631 is an apocalyptic number.

64450695631 is a deficient number, since it is larger than the sum of its proper divisors (10539675377).

64450695631 is a wasteful number, since it uses less digits than its factorization.

64450695631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300238 (or 300231 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 64450695631 in words is "sixty-four billion, four hundred fifty million, six hundred ninety-five thousand, six hundred thirty-one".