155593972451 has 2 divisors, whose sum is σ = 155593972452. Its totient is φ = 155593972450.

The previous prime is 155593972447. The next prime is 155593972453. The reversal of 155593972451 is 154279395551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155593972451 - 2² = 155593972447 is a prime.

Together with 155593972453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155593972453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77796986225 + 77796986226.

It is an arithmetic number, because the mean of its divisors is an integer number (77796986226).

Almost surely, 2^155593972451 is an apocalyptic number.

155593972451 is a deficient number, since it is larger than the sum of its proper divisors (1).

155593972451 is an equidigital number, since it uses as much as digits as its factorization.

155593972451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505000, while the sum is 56.

The spelling of 155593972451 in words is "one hundred fifty-five billion, five hundred ninety-three million, nine hundred seventy-two thousand, four hundred fifty-one".