649571078 has 16 divisors (see below), whose sum is σ = 1051940736. Its totient is φ = 299049600.

The previous prime is 649571057. The next prime is 649571093. The reversal of 649571078 is 870175946.

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, 20726 + ... + 41577.

It is an arithmetic number, because the mean of its divisors is an integer number (65746296).

Almost surely, 2^649571078 is an apocalyptic number.

649571078 is a deficient number, since it is larger than the sum of its proper divisors (402369658).

649571078 is a wasteful number, since it uses less digits than its factorization.

649571078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62719.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 649571078 is about 25486.6843273110. The cubic root of 649571078 is about 866.0485254612.

The spelling of 649571078 in words is "six hundred forty-nine million, five hundred seventy-one thousand, seventy-eight".