15802845057 has 18 divisors (see below), whose sum is σ = 24171435522. Its totient is φ = 9914534976.

The previous prime is 15802845049. The next prime is 15802845089. The reversal of 15802845057 is 75054820851.

15802845057 is a `hidden beast` number, since 1 + 580 + 28 + 45 + 0 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14873265936 + 929579121 = 121956^2 + 30489^2 .

It is not a de Polignac number, because 15802845057 - 2³ = 15802845049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15802845757) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1549858 + ... + 1560020.

It is an arithmetic number, because the mean of its divisors is an integer number (1342857529).

Almost surely, 2^15802845057 is an apocalyptic number.

15802845057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15802845057 is a deficient number, since it is larger than the sum of its proper divisors (8368590465).

15802845057 is an frugal number, since it uses more digits than its factorization.

15802845057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349 (or 10183 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The spelling of 15802845057 in words is "fifteen billion, eight hundred two million, eight hundred forty-five thousand, fifty-seven".