3261724221628 has 24 divisors (see below), whose sum is σ = 6191192466144. Its totient is φ = 1497491750400.

The previous prime is 3261724221617. The next prime is 3261724221629. The reversal of 3261724221628 is 8261224271623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261724221629) 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, 584954928 + ... + 584960503.

It is an arithmetic number, because the mean of its divisors is an integer number (257966352756).

Almost surely, 2^{3261724221628} is an apocalyptic number.

It is an amenable number.

3261724221628 is a deficient number, since it is larger than the sum of its proper divisors (2929468244516).

3261724221628 is a wasteful number, since it uses less digits than its factorization.

3261724221628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169915493 (or 1169915491 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 3261724221628 in words is "three trillion, two hundred sixty-one billion, seven hundred twenty-four million, two hundred twenty-one thousand, six hundred twenty-eight".