51881149698 has 32 divisors (see below), whose sum is σ = 122674642560. Its totient is φ = 14312040960.

The previous prime is 51881149693. The next prime is 51881149699. The reversal of 51881149698 is 89694118815.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51881149693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21296463 + ... + 21298898.

It is an arithmetic number, because the mean of its divisors is an integer number (3833582580).

Almost surely, 2^51881149698 is an apocalyptic number.

51881149698 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51881149698 is an abundant number, since it is smaller than the sum of its proper divisors (70793492862).

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

51881149698 is a wasteful number, since it uses less digits than its factorization.

51881149698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42595402.

The product of its digits is 4976640, while the sum is 60.

The spelling of 51881149698 in words is "fifty-one billion, eight hundred eighty-one million, one hundred forty-nine thousand, six hundred ninety-eight".