3641721700 has 36 divisors (see below), whose sum is σ = 7916844852. Its totient is φ = 1454051200.

The previous prime is 3641721679. The next prime is 3641721701. The reversal of 3641721700 is 71271463.

It can be written as a sum of positive squares in 6 ways, for example, as 1579108644 + 2062613056 = 39738^2 + 45416^2 .

It is not an unprimeable number, because it can be changed into a prime (3641721701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23010 + ... + 88390.

It is an arithmetic number, because the mean of its divisors is an integer number (219912357).

Almost surely, 2^3641721700 is an apocalyptic number.

It is an amenable number.

3641721700 is an abundant number, since it is smaller than the sum of its proper divisors (4275123152).

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

3641721700 is a wasteful number, since it uses less digits than its factorization.

3641721700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65952 (or 65945 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 3641721700 is about 60346.6792789794. The cubic root of 3641721700 is about 1538.5168297372.

The spelling of 3641721700 in words is "three billion, six hundred forty-one million, seven hundred twenty-one thousand, seven hundred".