85434440434 has 16 divisors (see below), whose sum is σ = 148644998208. Its totient is φ = 36068270832.

The previous prime is 85434440407. The next prime is 85434440467. The reversal of 85434440434 is 43404443458.

It is a happy number.

It is a super-2 number, since 2×85434440434² (a number of 23 digits) contains 22 as substring.

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, 45539809 + ... + 45541684.

It is an arithmetic number, because the mean of its divisors is an integer number (9290312388).

Almost surely, 2^85434440434 is an apocalyptic number.

85434440434 is a deficient number, since it is larger than the sum of its proper divisors (63210557774).

85434440434 is a wasteful number, since it uses less digits than its factorization.

85434440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91081569.

The product of its (nonzero) digits is 1474560, while the sum is 43.

The spelling of 85434440434 in words is "eighty-five billion, four hundred thirty-four million, four hundred forty thousand, four hundred thirty-four".