51640457454 has 24 divisors (see below), whose sum is σ = 112380563880. Its totient is φ = 17137654128.

The previous prime is 51640457411. The next prime is 51640457461. The reversal of 51640457454 is 45475404615.

51640457454 is a `hidden beast` number, since 516 + 40 + 4 + 57 + 45 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6315109 + ... + 6323280.

It is an arithmetic number, because the mean of its divisors is an integer number (4682523495).

Almost surely, 2^51640457454 is an apocalyptic number.

51640457454 is an abundant number, since it is smaller than the sum of its proper divisors (60740106426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51640457454 is a wasteful number, since it uses less digits than its factorization.

51640457454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12638624 (or 12638621 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 51640457454 in words is "fifty-one billion, six hundred forty million, four hundred fifty-seven thousand, four hundred fifty-four".