53649125874 has 128 divisors (see below), whose sum is σ = 124309831680. Its totient is φ = 17139874752.

The previous prime is 53649125867. The next prime is 53649125879. The reversal of 53649125874 is 47852194635.

It is a happy number.

53649125874 is a `hidden beast` number, since 5 + 3 + 6 + 49 + 12 + 587 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 53649125874.

It is not an unprimeable number, because it can be changed into a prime (53649125879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24351657 + ... + 24353859.

It is an arithmetic number, because the mean of its divisors is an integer number (971170560).

Almost surely, 2^53649125874 is an apocalyptic number.

53649125874 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 53649125874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62154915840).

53649125874 is an abundant number, since it is smaller than the sum of its proper divisors (70660705806).

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

53649125874 is a wasteful number, since it uses less digits than its factorization.

53649125874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2455 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 53649125874 in words is "fifty-three billion, six hundred forty-nine million, one hundred twenty-five thousand, eight hundred seventy-four".