42847157646544 has 20 divisors (see below), whose sum is σ = 87899683701924. Its totient is φ = 20163368304128.

The previous prime is 42847157646541. The next prime is 42847157646653. The reversal of 42847157646544 is 44564675174824.

It can be written as a sum of positive squares in 2 ways, for example, as 21214314810000 + 21632842836544 = 4605900^2 + 4651112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42847157646544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42847157646541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78763157167 + ... + 78763157710.

Almost surely, 2^{42847157646544} is an apocalyptic number.

It is an amenable number.

42847157646544 is an abundant number, since it is smaller than the sum of its proper divisors (45052526055380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42847157646544 is a wasteful number, since it uses less digits than its factorization.

42847157646544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157526314902 (or 157526314896 counting only the distinct ones).

The product of its digits is 722534400, while the sum is 67.

The spelling of 42847157646544 in words is "forty-two trillion, eight hundred forty-seven billion, one hundred fifty-seven million, six hundred forty-six thousand, five hundred forty-four".