1251351350451 has 16 divisors (see below), whose sum is σ = 1861610572800. Its totient is φ = 830743709544.

The previous prime is 1251351350413. The next prime is 1251351350461. The reversal of 1251351350451 is 1540531531521.

1251351350451 is a `hidden beast` number, since 1 + 2 + 5 + 135 + 13 + 504 + 5 + 1 = 666.

It is not a de Polignac number, because 1251351350451 - 2¹⁷ = 1251351219379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251351350461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96952431 + ... + 96965336.

It is an arithmetic number, because the mean of its divisors is an integer number (116350660800).

Almost surely, 2^{1251351350451} is an apocalyptic number.

1251351350451 is a deficient number, since it is larger than the sum of its proper divisors (610259222349).

1251351350451 is a wasteful number, since it uses less digits than its factorization.

1251351350451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193918015 (or 193918009 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 1251351350451 its reverse (1540531531521), we get a palindrome (2791882881972).

The spelling of 1251351350451 in words is "one trillion, two hundred fifty-one billion, three hundred fifty-one million, three hundred fifty thousand, four hundred fifty-one".