51545732291640 has 96 divisors (see below), whose sum is σ = 168365457468000. Its totient is φ = 13676455584000.

The previous prime is 51545732291639. The next prime is 51545732291681. The reversal of 51545732291640 is 4619223754515.

51545732291640 is a `hidden beast` number, since 5 + 1 + 5 + 4 + 573 + 2 + 2 + 9 + 1 + 64 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359683611 + ... + 359826890.

It is an arithmetic number, because the mean of its divisors is an integer number (1753806848625).

Almost surely, 2^{51545732291640} is an apocalyptic number.

It is an amenable number.

51545732291640 is an abundant number, since it is smaller than the sum of its proper divisors (116819725176360).

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

51545732291640 is a wasteful number, since it uses less digits than its factorization.

51545732291640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719510717 (or 719510710 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 51545732291640 in words is "fifty-one trillion, five hundred forty-five billion, seven hundred thirty-two million, two hundred ninety-one thousand, six hundred forty".