51356707090 has 32 divisors (see below), whose sum is σ = 105409064880. Its totient is φ = 17847035904.

The previous prime is 51356707079. The next prime is 51356707097. The reversal of 51356707090 is 9070765315.

It can be written as a sum of positive squares in 8 ways, for example, as 38356830801 + 12999876289 = 195849^2 + 114017^2 .

It is a super-2 number, since 2×51356707090² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51356707097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11616955 + ... + 11621374.

Almost surely, 2^51356707090 is an apocalyptic number.

51356707090 is an abundant number, since it is smaller than the sum of its proper divisors (54052357790).

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

51356707090 is a wasteful number, since it uses less digits than its factorization.

51356707090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23238366.

The product of its (nonzero) digits is 198450, while the sum is 43.

The spelling of 51356707090 in words is "fifty-one billion, three hundred fifty-six million, seven hundred seven thousand, ninety".