1551503648951 has 2 divisors, whose sum is σ = 1551503648952. Its totient is φ = 1551503648950.

The previous prime is 1551503648921. The next prime is 1551503649043. The reversal of 1551503648951 is 1598463051551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1551503648951 - 2³⁰ = 1550429907127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1551503648893 and 1551503648902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551503648921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775751824475 + 775751824476.

It is an arithmetic number, because the mean of its divisors is an integer number (775751824476).

Almost surely, 2^{1551503648951} is an apocalyptic number.

1551503648951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551503648951 is an equidigital number, since it uses as much as digits as its factorization.

1551503648951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240000, while the sum is 53.

The spelling of 1551503648951 in words is "one trillion, five hundred fifty-one billion, five hundred three million, six hundred forty-eight thousand, nine hundred fifty-one".