54247764991 has 4 divisors (see below), whose sum is σ = 61997445712. Its totient is φ = 46498084272.

The previous prime is 54247764943. The next prime is 54247765027. The reversal of 54247764991 is 19946774245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54247764991 - 2¹⁵ = 54247732223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54247764941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3874840350 + ... + 3874840363.

It is an arithmetic number, because the mean of its divisors is an integer number (15499361428).

Almost surely, 2^54247764991 is an apocalyptic number.

54247764991 is a deficient number, since it is larger than the sum of its proper divisors (7749680721).

54247764991 is an equidigital number, since it uses as much as digits as its factorization.

54247764991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749680720.

The product of its digits is 15240960, while the sum is 58.

The spelling of 54247764991 in words is "fifty-four billion, two hundred forty-seven million, seven hundred sixty-four thousand, nine hundred ninety-one".