51738075540 has 96 divisors (see below), whose sum is σ = 161019048960. Its totient is φ = 13792007808.

The previous prime is 51738075509. The next prime is 51738075551. The reversal of 51738075540 is 4557083715.

It is a happy number.

51738075540 is a `hidden beast` number, since 5 + 1 + 7 + 38 + 0 + 75 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1695054 + ... + 1725306.

It is an arithmetic number, because the mean of its divisors is an integer number (1677281760).

Almost surely, 2^51738075540 is an apocalyptic number.

It is an amenable number.

51738075540 is an abundant number, since it is smaller than the sum of its proper divisors (109280973420).

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

51738075540 is a wasteful number, since it uses less digits than its factorization.

51738075540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33438 (or 33430 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 51738075540 in words is "fifty-one billion, seven hundred thirty-eight million, seventy-five thousand, five hundred forty".