2621445123451 has 16 divisors (see below), whose sum is σ = 3295305934848. Its totient is φ = 2042684504520.

The previous prime is 2621445123439. The next prime is 2621445123509. The reversal of 2621445123451 is 1543215441262.

It is not a de Polignac number, because 2621445123451 - 2⁵ = 2621445123419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621445124451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140671435 + ... + 140690068.

It is an arithmetic number, because the mean of its divisors is an integer number (205956620928).

Almost surely, 2^{2621445123451} is an apocalyptic number.

2621445123451 is a deficient number, since it is larger than the sum of its proper divisors (673860811397).

2621445123451 is an equidigital number, since it uses as much as digits as its factorization.

2621445123451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281361543 (or 281361521 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 2621445123451 in words is "two trillion, six hundred twenty-one billion, four hundred forty-five million, one hundred twenty-three thousand, four hundred fifty-one".