51669419055831 has 32 divisors (see below), whose sum is σ = 77639079513600. Its totient is φ = 33955143727680.

The previous prime is 51669419055739. The next prime is 51669419055923. The reversal of 51669419055831 is 13855091496615.

51669419055831 is a `hidden beast` number, since 5 + 1 + 6 + 6 + 9 + 41 + 9 + 0 + 5 + 583 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (51669419055739) and next prime (51669419055923).

It is not a de Polignac number, because 51669419055831 - 2¹⁸ = 51669418793687 is a prime.

It is a super-2 number, since 2×51669419055831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51669419055731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8536920 + ... + 13274706.

It is an arithmetic number, because the mean of its divisors is an integer number (2426221234800).

Almost surely, 2^{51669419055831} is an apocalyptic number.

51669419055831 is a deficient number, since it is larger than the sum of its proper divisors (25969660457769).

51669419055831 is a wasteful number, since it uses less digits than its factorization.

51669419055831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743556 (or 4743550 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 63.

The spelling of 51669419055831 in words is "fifty-one trillion, six hundred sixty-nine billion, four hundred nineteen million, fifty-five thousand, eight hundred thirty-one".