53872447781 has 8 divisors (see below), whose sum is σ = 55272263424. Its totient is φ = 52476720480.

The previous prime is 53872447763. The next prime is 53872447793. The reversal of 53872447781 is 18774427835.

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

It is a cyclic number.

It is not a de Polignac number, because 53872447781 - 2²² = 53868253477 is a prime.

It is a super-2 number, since 2×53872447781² (a number of 22 digits) contains 22 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 (53872447711) 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, 995381 + ... + 1048106.

It is an arithmetic number, because the mean of its divisors is an integer number (6909032928).

Almost surely, 2^53872447781 is an apocalyptic number.

It is an amenable number.

53872447781 is a deficient number, since it is larger than the sum of its proper divisors (1399815643).

53872447781 is a wasteful number, since it uses less digits than its factorization.

53872447781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044171.

The product of its digits is 10536960, while the sum is 56.

The spelling of 53872447781 in words is "fifty-three billion, eight hundred seventy-two million, four hundred forty-seven thousand, seven hundred eighty-one".