51531968462340 has 96 divisors (see below), whose sum is σ = 145357153966080. Its totient is φ = 13640218300800.

The previous prime is 51531968462309. The next prime is 51531968462357. The reversal of 51531968462340 is 4326486913515.

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, 40498005 + ... + 41751075.

It is an arithmetic number, because the mean of its divisors is an integer number (1514137020480).

Almost surely, 2^{51531968462340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51531968462340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72678576983040).

51531968462340 is an abundant number, since it is smaller than the sum of its proper divisors (93825185503740).

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

51531968462340 is a wasteful number, since it uses less digits than its factorization.

51531968462340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258153 (or 1258151 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 57.

The spelling of 51531968462340 in words is "fifty-one trillion, five hundred thirty-one billion, nine hundred sixty-eight million, four hundred sixty-two thousand, three hundred forty".