8557421542 has 4 divisors (see below), whose sum is σ = 12836132316. Its totient is φ = 4278710770.

The previous prime is 8557421527. The next prime is 8557421573. The reversal of 8557421542 is 2451247558.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139355384 + ... + 2139355387.

It is an arithmetic number, because the mean of its divisors is an integer number (3209033079).

Almost surely, 2^8557421542 is an apocalyptic number.

8557421542 is a deficient number, since it is larger than the sum of its proper divisors (4278710774).

8557421542 is a wasteful number, since it uses less digits than its factorization.

8557421542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278710773.

The product of its digits is 448000, while the sum is 43.

The square root of 8557421542 is about 92506.3324427036. The cubic root of 8557421542 is about 2045.4128280247.

The spelling of 8557421542 in words is "eight billion, five hundred fifty-seven million, four hundred twenty-one thousand, five hundred forty-two".