3721540641 has 24 divisors (see below), whose sum is σ = 6216202944. Its totient is φ = 1963009440.

The previous prime is 3721540639. The next prime is 3721540649. The reversal of 3721540641 is 1460451273.

It is not a de Polignac number, because 3721540641 - 2¹ = 3721540639 is a prime.

It is a super-2 number, since 2×3721540641² = 27699729485229381762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3721540649) 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, 971805 + ... + 975626.

It is an arithmetic number, because the mean of its divisors is an integer number (259008456).

Almost surely, 2^3721540641 is an apocalyptic number.

It is an amenable number.

3721540641 is a deficient number, since it is larger than the sum of its proper divisors (2494662303).

3721540641 is a wasteful number, since it uses less digits than its factorization.

3721540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947461 (or 1947454 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 3721540641 is about 61004.4313226507. The cubic root of 3721540641 is about 1549.6760531468.

The spelling of 3721540641 in words is "three billion, seven hundred twenty-one million, five hundred forty thousand, six hundred forty-one".