51654247680 has 432 divisors, whose sum is σ = 192803030784. Its totient is φ = 11751505920.

The previous prime is 51654247621. The next prime is 51654247693. The reversal of 51654247680 is 8674245615.

It is a super-2 number, since 2×51654247680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50990854 + ... + 50991866.

It is an arithmetic number, because the mean of its divisors is an integer number (446303312).

Almost surely, 2^51654247680 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 51654247680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96401515392).

51654247680 is an abundant number, since it is smaller than the sum of its proper divisors (141148783104).

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

51654247680 is a wasteful number, since it uses less digits than its factorization.

51654247680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 51654247680 in words is "fifty-one billion, six hundred fifty-four million, two hundred forty-seven thousand, six hundred eighty".