51651201273540 has 96 divisors (see below), whose sum is σ = 158431072020480. Its totient is φ = 12469112073600.

The previous prime is 51651201273517. The next prime is 51651201273587. The reversal of 51651201273540 is 4537210215615.

It is a junction number, because it is equal to n+sod(n) for n = 51651201273492 and 51651201273501.

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, 163564846 + ... + 163880325.

It is an arithmetic number, because the mean of its divisors is an integer number (1650323666880).

Almost surely, 2^{51651201273540} is an apocalyptic number.

It is an amenable number.

51651201273540 is an abundant number, since it is smaller than the sum of its proper divisors (106779870746940).

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

51651201273540 is a wasteful number, since it uses less digits than its factorization.

51651201273540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327445433 (or 327445431 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 51651201273540 in words is "fifty-one trillion, six hundred fifty-one billion, two hundred one million, two hundred seventy-three thousand, five hundred forty".