2621001423645 has 96 divisors (see below), whose sum is σ = 5028886781568. Its totient is φ = 1252238400000.

The previous prime is 2621001423641. The next prime is 2621001423659. The reversal of 2621001423645 is 5463241001262.

2621001423645 is a `hidden beast` number, since 2 + 6 + 2 + 1 + 0 + 0 + 1 + 4 + 2 + 3 + 645 = 666.

It is not a de Polignac number, because 2621001423645 - 2² = 2621001423641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621001423641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10424715 + ... + 10673175.

It is an arithmetic number, because the mean of its divisors is an integer number (52384237308).

Almost surely, 2^{2621001423645} is an apocalyptic number.

It is an amenable number.

2621001423645 is a deficient number, since it is larger than the sum of its proper divisors (2407885357923).

2621001423645 is a wasteful number, since it uses less digits than its factorization.

2621001423645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248795 (or 248792 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 2621001423645 in words is "two trillion, six hundred twenty-one billion, one million, four hundred twenty-three thousand, six hundred forty-five".