64831149 has 24 divisors (see below), whose sum is σ = 99470592. Its totient is φ = 40548480.

The previous prime is 64831111. The next prime is 64831159. The reversal of 64831149 is 94113846.

64831149 is a `hidden beast` number, since 648 + 3 + 1 + 1 + 4 + 9 = 666.

It is not a de Polignac number, because 64831149 - 2⁹ = 64830637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64831159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74692 + ... + 75554.

It is an arithmetic number, because the mean of its divisors is an integer number (4144608).

Almost surely, 2^64831149 is an apocalyptic number.

It is an amenable number.

64831149 is a deficient number, since it is larger than the sum of its proper divisors (34639443).

64831149 is a wasteful number, since it uses less digits than its factorization.

64831149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1374 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 64831149 is about 8051.7792443658. The cubic root of 64831149 is about 401.7241182798.

It can be divided in two parts, 64831 and 149, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 64831149 in words is "sixty-four million, eight hundred thirty-one thousand, one hundred forty-nine".