51275546031690 has 160 divisors (see below), whose sum is σ = 142582026622464. Its totient is φ = 13208204580480.

The previous prime is 51275546031629. The next prime is 51275546031713. The reversal of 51275546031690 is 9613064557215.

51275546031690 is a `hidden beast` number, since 5 + 1 + 2 + 7 + 5 + 546 + 0 + 3 + 1 + 6 + 90 = 666.

It is a super-2 number, since 2×51275546031690² (a number of 28 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11868592 + ... + 15601748.

Almost surely, 2^{51275546031690} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51275546031690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71291013311232).

51275546031690 is an abundant number, since it is smaller than the sum of its proper divisors (91306480590774).

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

51275546031690 is a wasteful number, since it uses less digits than its factorization.

51275546031690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733754 (or 3733745 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The spelling of 51275546031690 in words is "fifty-one trillion, two hundred seventy-five billion, five hundred forty-six million, thirty-one thousand, six hundred ninety".