2621357851 has 24 divisors (see below), whose sum is σ = 3108533760. Its totient is φ = 2203673472.

The previous prime is 2621357807. The next prime is 2621357881. The reversal of 2621357851 is 1587531262.

It is a de Polignac number, because none of the positive numbers 2^k-2621357851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621357881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 551481 + ... + 556213.

It is an arithmetic number, because the mean of its divisors is an integer number (129522240).

Almost surely, 2^2621357851 is an apocalyptic number.

2621357851 is a deficient number, since it is larger than the sum of its proper divisors (487175909).

2621357851 is a wasteful number, since it uses less digits than its factorization.

2621357851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963 (or 4956 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 2621357851 is about 51199.1977573868. The cubic root of 2621357851 is about 1378.8237984218.

The spelling of 2621357851 in words is "two billion, six hundred twenty-one million, three hundred fifty-seven thousand, eight hundred fifty-one".