54999989692639 has 2 divisors, whose sum is σ = 54999989692640. Its totient is φ = 54999989692638.

The previous prime is 54999989692631. The next prime is 54999989692651. The reversal of 54999989692639 is 93629698999945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54999989692639 - 2³ = 54999989692631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54999989692631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27499994846319 + 27499994846320.

It is an arithmetic number, because the mean of its divisors is an integer number (27499994846320).

Almost surely, 2^{54999989692639} is an apocalyptic number.

54999989692639 is a deficient number, since it is larger than the sum of its proper divisors (1).

54999989692639 is an equidigital number, since it uses as much as digits as its factorization.

54999989692639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165299408640, while the sum is 97.

The spelling of 54999989692639 in words is "fifty-four trillion, nine hundred ninety-nine billion, nine hundred eighty-nine million, six hundred ninety-two thousand, six hundred thirty-nine".