51284030655 has 128 divisors (see below), whose sum is σ = 98429829120. Its totient is φ = 22473884160.

The previous prime is 51284030653. The next prime is 51284030657. The reversal of 51284030655 is 55603048215.

It is an interprime number because it is at equal distance from previous prime (51284030653) and next prime (51284030657).

It is not a de Polignac number, because 51284030655 - 2¹ = 51284030653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284030653) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21519594 + ... + 21521976.

It is an arithmetic number, because the mean of its divisors is an integer number (768983040).

Almost surely, 2^51284030655 is an apocalyptic number.

51284030655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51284030655 is a deficient number, since it is larger than the sum of its proper divisors (47145798465).

51284030655 is a wasteful number, since it uses less digits than its factorization.

51284030655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 51284030655 in words is "fifty-one billion, two hundred eighty-four million, thirty thousand, six hundred fifty-five".