53749111680 has 512 divisors, whose sum is σ = 210291033600. Its totient is φ = 13026355200.

The previous prime is 53749111639. The next prime is 53749111727. The reversal of 53749111680 is 8611194735.

53749111680 is a `hidden beast` number, since 5 + 374 + 91 + 116 + 80 = 666.

It is a super-2 number, since 2×53749111680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15394735 + ... + 15398225.

It is an arithmetic number, because the mean of its divisors is an integer number (410724675).

Almost surely, 2^53749111680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53749111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105145516800).

53749111680 is an abundant number, since it is smaller than the sum of its proper divisors (156541921920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53749111680 is an equidigital number, since it uses as much as digits as its factorization.

53749111680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542 (or 3512 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 53749111680 in words is "fifty-three billion, seven hundred forty-nine million, one hundred eleven thousand, six hundred eighty".