2621986451 has 16 divisors (see below), whose sum is σ = 3017917440. Its totient is φ = 2231436480.

The previous prime is 2621986441. The next prime is 2621986469. The reversal of 2621986451 is 1546891262.

It is not a de Polignac number, because 2621986451 - 2¹⁴ = 2621970067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621986421) 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, 1140335 + ... + 1142631.

It is an arithmetic number, because the mean of its divisors is an integer number (188619840).

Almost surely, 2^2621986451 is an apocalyptic number.

2621986451 is a deficient number, since it is larger than the sum of its proper divisors (395930989).

2621986451 is a wasteful number, since it uses less digits than its factorization.

2621986451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394.

The product of its digits is 207360, while the sum is 44.

The square root of 2621986451 is about 51205.3361574748. The cubic root of 2621986451 is about 1378.9340033128.

The spelling of 2621986451 in words is "two billion, six hundred twenty-one million, nine hundred eighty-six thousand, four hundred fifty-one".