15500598061 has 4 divisors (see below), whose sum is σ = 16692951772. Its totient is φ = 14308244352.

The previous prime is 15500598053. The next prime is 15500598089. The reversal of 15500598061 is 16089500551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4823302500 + 10677295561 = 69450^2 + 103331^2 .

It is a cyclic number.

It is not a de Polignac number, because 15500598061 - 2³ = 15500598053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15500508061) 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, 596176836 + ... + 596176861.

It is an arithmetic number, because the mean of its divisors is an integer number (4173237943).

Almost surely, 2^15500598061 is an apocalyptic number.

It is an amenable number.

15500598061 is a deficient number, since it is larger than the sum of its proper divisors (1192353711).

15500598061 is a wasteful number, since it uses less digits than its factorization.

15500598061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192353710.

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 15500598061 in words is "fifteen billion, five hundred million, five hundred ninety-eight thousand, sixty-one".