51161501050 has 96 divisors (see below), whose sum is σ = 106428991680. Its totient is φ = 18136742400.

The previous prime is 51161501033. The next prime is 51161501057. The reversal of 51161501050 is 5010516115.

It is a super-2 number, since 2×51161501050² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (51161501057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14495686 + ... + 14499214.

It is an arithmetic number, because the mean of its divisors is an integer number (1108635330).

Almost surely, 2^51161501050 is an apocalyptic number.

51161501050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51161501050 is an abundant number, since it is smaller than the sum of its proper divisors (55267490630).

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

51161501050 is a wasteful number, since it uses less digits than its factorization.

51161501050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208 (or 4203 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 51161501050 in words is "fifty-one billion, one hundred sixty-one million, five hundred one thousand, fifty".