51481267560 has 48 divisors (see below), whose sum is σ = 167314120740. Its totient is φ = 13728337920.

The previous prime is 51481267559. The next prime is 51481267561. The reversal of 51481267560 is 6576218415.

51481267560 is a `hidden beast` number, since 5 + 1 + 4 + 81 + 2 + 6 + 7 + 560 = 666.

It is an interprime number because it is at equal distance from previous prime (51481267559) and next prime (51481267561).

It can be written as a sum of positive squares in 2 ways, for example, as 46368731556 + 5112536004 = 215334^2 + 71502^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51481267561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71501401 + ... + 71502120.

Almost surely, 2^51481267560 is an apocalyptic number.

It is an amenable number.

51481267560 is an abundant number, since it is smaller than the sum of its proper divisors (115832853180).

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

51481267560 is a wasteful number, since it uses less digits than its factorization.

51481267560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143003538 (or 143003531 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 51481267560 in words is "fifty-one billion, four hundred eighty-one million, two hundred sixty-seven thousand, five hundred sixty".