51161462064 has 120 divisors (see below), whose sum is σ = 147911961600. Its totient is φ = 16491173760.

The previous prime is 51161461973. The next prime is 51161462071. The reversal of 51161462064 is 46026416115.

51161462064 is a `hidden beast` number, since 5 + 1 + 16 + 14 + 620 + 6 + 4 = 666.

It is a super-2 number, since 2×51161462064² (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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7223677 + ... + 7230755.

It is an arithmetic number, because the mean of its divisors is an integer number (1232599680).

Almost surely, 2^51161462064 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 51161462064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73955980800).

51161462064 is an abundant number, since it is smaller than the sum of its proper divisors (96750499536).

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

51161462064 is a wasteful number, since it uses less digits than its factorization.

51161462064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8743 (or 8734 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 51161462064 its reverse (46026416115), we get a palindrome (97187878179).

The spelling of 51161462064 in words is "fifty-one billion, one hundred sixty-one million, four hundred sixty-two thousand, sixty-four".