649143632 has 40 divisors (see below), whose sum is σ = 1277418240. Its totient is φ = 319512960.

The previous prime is 649143617. The next prime is 649143647. The reversal of 649143632 is 236341946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (649143617) and next prime (649143647).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635282 + ... + 636302.

It is an arithmetic number, because the mean of its divisors is an integer number (31935456).

Almost surely, 2^649143632 is an apocalyptic number.

It is an amenable number.

649143632 is a deficient number, since it is larger than the sum of its proper divisors (628274608).

649143632 is a wasteful number, since it uses less digits than its factorization.

649143632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1605 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 649143632 is about 25478.2972743470. The cubic root of 649143632 is about 865.8585179211.

The spelling of 649143632 in words is "six hundred forty-nine million, one hundred forty-three thousand, six hundred thirty-two".