84521591074 has 4 divisors (see below), whose sum is σ = 126782386614. Its totient is φ = 42260795536.

The previous prime is 84521591059. The next prime is 84521591081. The reversal of 84521591074 is 47019512548.

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

It can be written as a sum of positive squares in only one way, i.e., 59670275625 + 24851315449 = 244275^2 + 157643^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130397767 + ... + 21130397770.

Almost surely, 2^84521591074 is an apocalyptic number.

84521591074 is a deficient number, since it is larger than the sum of its proper divisors (42260795540).

84521591074 is a wasteful number, since it uses less digits than its factorization.

84521591074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42260795539.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 84521591074 in words is "eighty-four billion, five hundred twenty-one million, five hundred ninety-one thousand, seventy-four".