51469892640 has 96 divisors (see below), whose sum is σ = 180144639360. Its totient is φ = 13725303552.

The previous prime is 51469892633. The next prime is 51469892641. The reversal of 51469892640 is 4629896415.

51469892640 is a `hidden beast` number, since 51 + 469 + 8 + 92 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (51469892641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5952844 + ... + 5961483.

It is an arithmetic number, because the mean of its divisors is an integer number (1876506660).

Almost surely, 2^51469892640 is an apocalyptic number.

It is an amenable number.

51469892640 is an abundant number, since it is smaller than the sum of its proper divisors (128674746720).

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

51469892640 is a wasteful number, since it uses less digits than its factorization.

51469892640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11914351 (or 11914337 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 51469892640 in words is "fifty-one billion, four hundred sixty-nine million, eight hundred ninety-two thousand, six hundred forty".