84657072242 has 18 divisors (see below), whose sum is σ = 127677545037. Its totient is φ = 42099137136.

The previous prime is 84657072221. The next prime is 84657072257. The reversal of 84657072242 is 24227075648.

It can be written as a sum of positive squares in 2 ways, for example, as 76385351641 + 8271720601 = 276379^2 + 90949^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=205739.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 95873933 + ... + 95874815.

Almost surely, 2^84657072242 is an apocalyptic number.

84657072242 is a deficient number, since it is larger than the sum of its proper divisors (43020472795).

84657072242 is an frugal number, since it uses more digits than its factorization.

84657072242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 47.

The spelling of 84657072242 in words is "eighty-four billion, six hundred fifty-seven million, seventy-two thousand, two hundred forty-two".