54190636781 has 4 divisors (see below), whose sum is σ = 55450884192. Its totient is φ = 52930389372.

The previous prime is 54190636769. The next prime is 54190636811. The reversal of 54190636781 is 18763609145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54190636781 - 2¹⁰ = 54190635757 is a prime.

It is a super-2 number, since 2×54190636781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54190636681) 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, 630123641 + ... + 630123726.

It is an arithmetic number, because the mean of its divisors is an integer number (13862721048).

Almost surely, 2^54190636781 is an apocalyptic number.

It is an amenable number.

54190636781 is a deficient number, since it is larger than the sum of its proper divisors (1260247411).

54190636781 is a wasteful number, since it uses less digits than its factorization.

54190636781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260247410.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 54190636781 in words is "fifty-four billion, one hundred ninety million, six hundred thirty-six thousand, seven hundred eighty-one".