51615465930 has 288 divisors, whose sum is σ = 167113110528. Its totient is φ = 10814860800.

The previous prime is 51615465901. The next prime is 51615465931. The reversal of 51615465930 is 3956451615.

51615465930 is a `hidden beast` number, since 5 + 1 + 6 + 1 + 54 + 6 + 593 + 0 = 666.

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 (51615465931) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7046670 + ... + 7053990.

It is an arithmetic number, because the mean of its divisors is an integer number (580253856).

Almost surely, 2^51615465930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51615465930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83556555264).

51615465930 is an abundant number, since it is smaller than the sum of its proper divisors (115497644598).

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

51615465930 is a wasteful number, since it uses less digits than its factorization.

51615465930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410 (or 7388 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 51615465930 in words is "fifty-one billion, six hundred fifteen million, four hundred sixty-five thousand, nine hundred thirty".