3261641620 has 24 divisors (see below), whose sum is σ = 6850744488. Its totient is φ = 1304409600.

The previous prime is 3261641567. The next prime is 3261641627. The reversal of 3261641620 is 261461623.

It can be written as a sum of positive squares in 4 ways, for example, as 426505104 + 2835136516 = 20652^2 + 53246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261641627) 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, 123160 + ... + 147280.

It is an arithmetic number, because the mean of its divisors is an integer number (285447687).

Almost surely, 2^3261641620 is an apocalyptic number.

It is an amenable number.

3261641620 is an abundant number, since it is smaller than the sum of its proper divisors (3589102868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3261641620 is a wasteful number, since it uses less digits than its factorization.

3261641620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30891 (or 30889 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 3261641620 is about 57110.7837452788. The cubic root of 3261641620 is about 1483.0145550157.

The spelling of 3261641620 in words is "three billion, two hundred sixty-one million, six hundred forty-one thousand, six hundred twenty".