649071654 has 64 divisors (see below), whose sum is σ = 1703669760. Its totient is φ = 159714720.

The previous prime is 649071637. The next prime is 649071667. The reversal of 649071654 is 456170946.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28194 + ... + 45749.

It is an arithmetic number, because the mean of its divisors is an integer number (26619840).

Almost surely, 2^649071654 is an apocalyptic number.

649071654 is an abundant number, since it is smaller than the sum of its proper divisors (1054598106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649071654 is a wasteful number, since it uses less digits than its factorization.

649071654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73985.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 649071654 is about 25476.8846996645. The cubic root of 649071654 is about 865.8265141832.

The spelling of 649071654 in words is "six hundred forty-nine million, seventy-one thousand, six hundred fifty-four".