51644000190 has 32 divisors (see below), whose sum is σ = 127943847936. Its totient is φ = 13327483680.

The previous prime is 51644000189. The next prime is 51644000209. The reversal of 51644000190 is 9100044615.

It is a happy number.

It is a super-2 number, since 2×51644000190² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 27764662 + ... + 27766521.

It is an arithmetic number, because the mean of its divisors is an integer number (3998245248).

Almost surely, 2^51644000190 is an apocalyptic number.

51644000190 is an abundant number, since it is smaller than the sum of its proper divisors (76299847746).

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

51644000190 is a wasteful number, since it uses less digits than its factorization.

51644000190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55531224.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 51644000190 in words is "fifty-one billion, six hundred forty-four million, one hundred ninety", and thus it is an aban number.