51275254646 has 32 divisors (see below), whose sum is σ = 95911333632. Its totient is φ = 19973216160.

The previous prime is 51275254643. The next prime is 51275254649. The reversal of 51275254646 is 64645257215.

It is an interprime number because it is at equal distance from previous prime (51275254643) and next prime (51275254649).

It is a self number, because there is not a number n which added to its sum of digits gives 51275254646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51275254643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 768305 + ... + 832371.

It is an arithmetic number, because the mean of its divisors is an integer number (2997229176).

Almost surely, 2^51275254646 is an apocalyptic number.

51275254646 is a deficient number, since it is larger than the sum of its proper divisors (44636078986).

51275254646 is a wasteful number, since it uses less digits than its factorization.

51275254646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69284.

The product of its digits is 2016000, while the sum is 47.

The spelling of 51275254646 in words is "fifty-one billion, two hundred seventy-five million, two hundred fifty-four thousand, six hundred forty-six".