163927915525 has 48 divisors (see below), whose sum is σ = 238855569408. Its totient is φ = 110358072000.

The previous prime is 163927915519. The next prime is 163927915631. The reversal of 163927915525 is 525519729361.

163927915525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163927915525 - 2¹⁷ = 163927784453 is a prime.

It is a super-2 number, since 2×163927915525² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221949 + ... + 614098.

It is an arithmetic number, because the mean of its divisors is an integer number (4976157696).

Almost surely, 2^163927915525 is an apocalyptic number.

It is an amenable number.

163927915525 is a deficient number, since it is larger than the sum of its proper divisors (74927653883).

163927915525 is a wasteful number, since it uses less digits than its factorization.

163927915525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836122 (or 836117 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 55.

The spelling of 163927915525 in words is "one hundred sixty-three billion, nine hundred twenty-seven million, nine hundred fifteen thousand, five hundred twenty-five".