155421402526564 has 24 divisors (see below), whose sum is σ = 280775688732000. Its totient is φ = 75231763469184.

The previous prime is 155421402526547. The next prime is 155421402526583. The reversal of 155421402526564 is 465625204124551.

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, 3998267314 + ... + 3998306185.

It is an arithmetic number, because the mean of its divisors is an integer number (11698987030500).

Almost surely, 2^{155421402526564} is an apocalyptic number.

It is an amenable number.

155421402526564 is a deficient number, since it is larger than the sum of its proper divisors (125354286205436).

155421402526564 is a wasteful number, since it uses less digits than its factorization.

155421402526564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7996573659 (or 7996573657 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 52.

The spelling of 155421402526564 in words is "one hundred fifty-five trillion, four hundred twenty-one billion, four hundred two million, five hundred twenty-six thousand, five hundred sixty-four".