2158622564542 has 16 divisors (see below), whose sum is σ = 3240169706880. Its totient is φ = 1078566256152.

The previous prime is 2158622564479. The next prime is 2158622564557. The reversal of 2158622564542 is 2454652268512.

It is a super-2 number, since 2×2158622564542² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158622564542.

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, 17295253 + ... + 17419615.

It is an arithmetic number, because the mean of its divisors is an integer number (202510606680).

Almost surely, 2^{2158622564542} is an apocalyptic number.

2158622564542 is a deficient number, since it is larger than the sum of its proper divisors (1081547142338).

2158622564542 is a wasteful number, since it uses less digits than its factorization.

2158622564542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130287.

The product of its digits is 9216000, while the sum is 52.

The spelling of 2158622564542 in words is "two trillion, one hundred fifty-eight billion, six hundred twenty-two million, five hundred sixty-four thousand, five hundred forty-two".