15181827513456 has 40 divisors (see below), whose sum is σ = 39240795848464. Its totient is φ = 5057889845760.

The previous prime is 15181827513451. The next prime is 15181827513527. The reversal of 15181827513456 is 65431572818151.

It is a super-2 number, since 2×15181827513456² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15181827513396 and 15181827513405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15181827513451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84888661 + ... + 85067316.

Almost surely, 2^{15181827513456} is an apocalyptic number.

15181827513456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15181827513456 is an abundant number, since it is smaller than the sum of its proper divisors (24058968335008).

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

15181827513456 is a wasteful number, since it uses less digits than its factorization.

15181827513456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169957849 (or 169957843 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 57.

The spelling of 15181827513456 in words is "fifteen trillion, one hundred eighty-one billion, eight hundred twenty-seven million, five hundred thirteen thousand, four hundred fifty-six".