13156028655 has 64 divisors (see below), whose sum is σ = 26354073600. Its totient is φ = 5444449920.

The previous prime is 13156028653. The next prime is 13156028671. The reversal of 13156028655 is 55682065131.

It is a happy number.

It is not a de Polignac number, because 13156028655 - 2¹ = 13156028653 is a prime.

It is a super-2 number, since 2×13156028655² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156028653) 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, 252216 + ... + 299874.

It is an arithmetic number, because the mean of its divisors is an integer number (411782400).

Almost surely, 2^13156028655 is an apocalyptic number.

13156028655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13156028655 is an abundant number, since it is smaller than the sum of its proper divisors (13198044945).

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

13156028655 is a wasteful number, since it uses less digits than its factorization.

13156028655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47924.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 13156028655 in words is "thirteen billion, one hundred fifty-six million, twenty-eight thousand, six hundred fifty-five".