51456403774 has 8 divisors (see below), whose sum is σ = 77186468880. Its totient is φ = 25727580816.

The previous prime is 51456403771. The next prime is 51456403793. The reversal of 51456403774 is 47730465415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51456403774² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51456403771) 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, 198954 + ... + 377485.

It is an arithmetic number, because the mean of its divisors is an integer number (9648308610).

Almost surely, 2^51456403774 is an apocalyptic number.

51456403774 is a deficient number, since it is larger than the sum of its proper divisors (25730065106).

51456403774 is a wasteful number, since it uses less digits than its factorization.

51456403774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621074.

The product of its (nonzero) digits is 1411200, while the sum is 46.

The spelling of 51456403774 in words is "fifty-one billion, four hundred fifty-six million, four hundred three thousand, seven hundred seventy-four".