51643466434615 has 16 divisors (see below), whose sum is σ = 68204275550496. Its totient is φ = 37226505164800.

The previous prime is 51643466434591. The next prime is 51643466434627.

51643466434615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51643466434615 - 2¹⁵ = 51643466401847 is a prime.

It is a super-2 number, since 2×51643466434615² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51643466434615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4154737666 + ... + 4154750095.

It is an arithmetic number, because the mean of its divisors is an integer number (4262767221906).

Almost surely, 2^{51643466434615} is an apocalyptic number.

51643466434615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51643466434615 is a deficient number, since it is larger than the sum of its proper divisors (16560809115881).

51643466434615 is a wasteful number, since it uses less digits than its factorization.

51643466434615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8309487890.

The product of its digits is 74649600, while the sum is 58.

The spelling of 51643466434615 in words is "fifty-one trillion, six hundred forty-three billion, four hundred sixty-six million, four hundred thirty-four thousand, six hundred fifteen".