51016692451 has 4 divisors (see below), whose sum is σ = 51542637832. Its totient is φ = 50490747072.

The previous prime is 51016692437. The next prime is 51016692469. The reversal of 51016692451 is 15429661015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51016692451 - 2⁹ = 51016691939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51016692421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262972545 + ... + 262972738.

It is an arithmetic number, because the mean of its divisors is an integer number (12885659458).

Almost surely, 2^51016692451 is an apocalyptic number.

51016692451 is a deficient number, since it is larger than the sum of its proper divisors (525945381).

51016692451 is an equidigital number, since it uses as much as digits as its factorization.

51016692451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525945380.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 51016692451 in words is "fifty-one billion, sixteen million, six hundred ninety-two thousand, four hundred fifty-one".