53891799920639 has 8 divisors (see below), whose sum is σ = 55145198169600. Its totient is φ = 52638406243416.

The previous prime is 53891799920627. The next prime is 53891799920653. The reversal of 53891799920639 is 93602999719835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53891799920639 is a prime.

It is a super-4 number, since 4×53891799920639⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53891799920669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38563844 + ... + 39936870.

It is an arithmetic number, because the mean of its divisors is an integer number (6893149771200).

Almost surely, 2^{53891799920639} is an apocalyptic number.

53891799920639 is a deficient number, since it is larger than the sum of its proper divisors (1253398248961).

53891799920639 is a wasteful number, since it uses less digits than its factorization.

53891799920639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285869.

The product of its (nonzero) digits is 1785641760, while the sum is 80.

The spelling of 53891799920639 in words is "fifty-three trillion, eight hundred ninety-one billion, seven hundred ninety-nine million, nine hundred twenty thousand, six hundred thirty-nine".