649710061 has 24 divisors (see below), whose sum is σ = 887925024. Its totient is φ = 467318880.

The previous prime is 649710037. The next prime is 649710079. The reversal of 649710061 is 160017946.

It is a de Polignac number, because none of the positive numbers 2^k-649710061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649709999 and 649710026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649710031) 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, 39355 + ... + 53368.

It is an arithmetic number, because the mean of its divisors is an integer number (36996876).

Almost surely, 2^649710061 is an apocalyptic number.

It is an amenable number.

649710061 is a deficient number, since it is larger than the sum of its proper divisors (238214963).

649710061 is a wasteful number, since it uses less digits than its factorization.

649710061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92761 (or 92754 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 649710061 is about 25489.4107621185. The cubic root of 649710061 is about 866.1102879805.

The spelling of 649710061 in words is "six hundred forty-nine million, seven hundred ten thousand, sixty-one".