49991611451 has 2 divisors, whose sum is σ = 49991611452. Its totient is φ = 49991611450.

The previous prime is 49991611441. The next prime is 49991611457. The reversal of 49991611451 is 15411619994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49991611451 - 2⁶ = 49991611387 is a prime.

It is a super-2 number, since 2×49991611451² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49991611451.

It is not a weakly prime, because it can be changed into another prime (49991611457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24995805725 + 24995805726.

It is an arithmetic number, because the mean of its divisors is an integer number (24995805726).

Almost surely, 2^49991611451 is an apocalyptic number.

49991611451 is a deficient number, since it is larger than the sum of its proper divisors (1).

49991611451 is an equidigital number, since it uses as much as digits as its factorization.

49991611451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 50.

The spelling of 49991611451 in words is "forty-nine billion, nine hundred ninety-one million, six hundred eleven thousand, four hundred fifty-one".