51623544060 has 216 divisors, whose sum is σ = 172390484448. Its totient is φ = 12495225600.

The previous prime is 51623544053. The next prime is 51623544067. The reversal of 51623544060 is 6044532615.

51623544060 is a `hidden beast` number, since 5 + 16 + 235 + 4 + 406 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51623544053) and next prime (51623544067).

It is a super-2 number, since 2×51623544060² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623544067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17879937 + ... + 17882823.

Almost surely, 2^51623544060 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 51623544060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86195242224).

51623544060 is an abundant number, since it is smaller than the sum of its proper divisors (120766940388).

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

51623544060 is a wasteful number, since it uses less digits than its factorization.

51623544060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 51623544060 in words is "fifty-one billion, six hundred twenty-three million, five hundred forty-four thousand, sixty".