3251640405 has 32 divisors (see below), whose sum is σ = 5932410624. Its totient is φ = 1506640896.

The previous prime is 3251640317. The next prime is 3251640443. The reversal of 3251640405 is 5040461523.

It is not a de Polignac number, because 3251640405 - 2⁷ = 3251640277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487129 + ... + 493758.

It is an arithmetic number, because the mean of its divisors is an integer number (185387832).

Almost surely, 2^3251640405 is an apocalyptic number.

It is an amenable number.

3251640405 is a deficient number, since it is larger than the sum of its proper divisors (2680770219).

3251640405 is a wasteful number, since it uses less digits than its factorization.

3251640405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980925.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 3251640405 is about 57023.1567435546. The cubic root of 3251640405 is about 1481.4972073301.

The spelling of 3251640405 in words is "three billion, two hundred fifty-one million, six hundred forty thousand, four hundred five".