51609090623 has 2 divisors, whose sum is σ = 51609090624. Its totient is φ = 51609090622.

The previous prime is 51609090571. The next prime is 51609090677. The reversal of 51609090623 is 32609090615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51609090623 - 2¹² = 51609086527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51609090823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25804545311 + 25804545312.

It is an arithmetic number, because the mean of its divisors is an integer number (25804545312).

Almost surely, 2^51609090623 is an apocalyptic number.

51609090623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51609090623 is an equidigital number, since it uses as much as digits as its factorization.

51609090623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 51609090623 in words is "fifty-one billion, six hundred nine million, ninety thousand, six hundred twenty-three".