658631649 has 32 divisors (see below), whose sum is σ = 962639104. Its totient is φ = 398131200.

The previous prime is 658631627. The next prime is 658631671. The reversal of 658631649 is 946136856.

It is an interprime number because it is at equal distance from previous prime (658631627) and next prime (658631671).

It is not a de Polignac number, because 658631649 - 2⁷ = 658631521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 658631598 and 658631607.

It is not an unprimeable number, because it can be changed into a prime (658631609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570657 + ... + 571809.

It is an arithmetic number, because the mean of its divisors is an integer number (30082472).

Almost surely, 2^658631649 is an apocalyptic number.

It is an amenable number.

658631649 is a deficient number, since it is larger than the sum of its proper divisors (304007455).

658631649 is a wasteful number, since it uses less digits than its factorization.

658631649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417.

The product of its digits is 933120, while the sum is 48.

The square root of 658631649 is about 25663.8198442866. The cubic root of 658631649 is about 870.0566524081.

The spelling of 658631649 in words is "six hundred fifty-eight million, six hundred thirty-one thousand, six hundred forty-nine".