8135202621556 has 24 divisors (see below), whose sum is σ = 14274055263104. Its totient is φ = 4056909373440.

The previous prime is 8135202621547. The next prime is 8135202621569. The reversal of 8135202621556 is 6551262025318.

It is a super-2 number, since 2×8135202621556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915956 + ... + 4977268.

Almost surely, 2^{8135202621556} is an apocalyptic number.

It is an amenable number.

8135202621556 is a deficient number, since it is larger than the sum of its proper divisors (6138852641548).

8135202621556 is a wasteful number, since it uses less digits than its factorization.

8135202621556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063911 (or 2063909 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 8135202621556 in words is "eight trillion, one hundred thirty-five billion, two hundred two million, six hundred twenty-one thousand, five hundred fifty-six".