2638687152851 has 2 divisors, whose sum is σ = 2638687152852. Its totient is φ = 2638687152850.

The previous prime is 2638687152839. The next prime is 2638687152869. The reversal of 2638687152851 is 1582517868362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2638687152851 - 2¹⁰ = 2638687151827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2638687152251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319343576425 + 1319343576426.

It is an arithmetic number, because the mean of its divisors is an integer number (1319343576426).

Almost surely, 2^{2638687152851} is an apocalyptic number.

2638687152851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638687152851 is an equidigital number, since it uses as much as digits as its factorization.

2638687152851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38707200, while the sum is 62.

The spelling of 2638687152851 in words is "two trillion, six hundred thirty-eight billion, six hundred eighty-seven million, one hundred fifty-two thousand, eight hundred fifty-one".