21160156134556 has 24 divisors (see below), whose sum is σ = 39198043851120. Its totient is φ = 9977683884672.

The previous prime is 21160156134553. The next prime is 21160156134569. The reversal of 21160156134556 is 65543165106112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160156134553) 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, 2121101281 + ... + 2121111256.

It is an arithmetic number, because the mean of its divisors is an integer number (1633251827130).

Almost surely, 2^{21160156134556} is an apocalyptic number.

It is an amenable number.

21160156134556 is a deficient number, since it is larger than the sum of its proper divisors (18037887716564).

21160156134556 is a wasteful number, since it uses less digits than its factorization.

21160156134556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242212613 (or 4242212611 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 21160156134556 in words is "twenty-one trillion, one hundred sixty billion, one hundred fifty-six million, one hundred thirty-four thousand, five hundred fifty-six".