15597253780 has 12 divisors (see below), whose sum is σ = 32754232980. Its totient is φ = 6238901504.

The previous prime is 15597253757. The next prime is 15597253781. The reversal of 15597253780 is 8735279551.

It can be written as a sum of positive squares in 2 ways, for example, as 2041774596 + 13555479184 = 45186^2 + 116428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15597253781) 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, 389931325 + ... + 389931364.

It is an arithmetic number, because the mean of its divisors is an integer number (2729519415).

Almost surely, 2^15597253780 is an apocalyptic number.

15597253780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15597253780 is an abundant number, since it is smaller than the sum of its proper divisors (17156979200).

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

15597253780 is a wasteful number, since it uses less digits than its factorization.

15597253780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779862698 (or 779862696 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 15597253780 in words is "fifteen billion, five hundred ninety-seven million, two hundred fifty-three thousand, seven hundred eighty".