646461436 has 24 divisors (see below), whose sum is σ = 1148780304. Its totient is φ = 318264960.

The previous prime is 646461433. The next prime is 646461449. The reversal of 646461436 is 634164646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646461433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100806 + ... + 107026.

It is an arithmetic number, because the mean of its divisors is an integer number (47865846).

Almost surely, 2^646461436 is an apocalyptic number.

It is an amenable number.

646461436 is a deficient number, since it is larger than the sum of its proper divisors (502318868).

646461436 is a wasteful number, since it uses less digits than its factorization.

646461436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621 (or 6619 counting only the distinct ones).

The product of its digits is 248832, while the sum is 40.

The square root of 646461436 is about 25425.6059121508. The cubic root of 646461436 is about 864.6643249642.

The spelling of 646461436 in words is "six hundred forty-six million, four hundred sixty-one thousand, four hundred thirty-six".