1551422807951 has 2 divisors, whose sum is σ = 1551422807952. Its totient is φ = 1551422807950.

The previous prime is 1551422807947. The next prime is 1551422808083. The reversal of 1551422807951 is 1597082241551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1551422807951 - 2² = 1551422807947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1551422807951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551422807251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775711403975 + 775711403976.

It is an arithmetic number, because the mean of its divisors is an integer number (775711403976).

Almost surely, 2^{1551422807951} is an apocalyptic number.

1551422807951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551422807951 is an equidigital number, since it uses as much as digits as its factorization.

1551422807951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 50.

The spelling of 1551422807951 in words is "one trillion, five hundred fifty-one billion, four hundred twenty-two million, eight hundred seven thousand, nine hundred fifty-one".