51138775102 has 16 divisors (see below), whose sum is σ = 79390322640. Its totient is φ = 24676157632.

The previous prime is 51138775081. The next prime is 51138775133. The reversal of 51138775102 is 20157783115.

It is a super-2 number, since 2×51138775102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79888 + ... + 329635.

It is an arithmetic number, because the mean of its divisors is an integer number (4961895165).

Almost surely, 2^51138775102 is an apocalyptic number.

51138775102 is a deficient number, since it is larger than the sum of its proper divisors (28251547538).

51138775102 is a wasteful number, since it uses less digits than its factorization.

51138775102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411707.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 51138775102 in words is "fifty-one billion, one hundred thirty-eight million, seven hundred seventy-five thousand, one hundred two".