85646574542 has 4 divisors (see below), whose sum is σ = 128469861816. Its totient is φ = 42823287270.

The previous prime is 85646574509. The next prime is 85646574547. The reversal of 85646574542 is 24547564658.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85646574547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21411643634 + ... + 21411643637.

It is an arithmetic number, because the mean of its divisors is an integer number (32117465454).

Almost surely, 2^85646574542 is an apocalyptic number.

85646574542 is a deficient number, since it is larger than the sum of its proper divisors (42823287274).

85646574542 is a wasteful number, since it uses less digits than its factorization.

85646574542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42823287273.

The product of its digits is 32256000, while the sum is 56.

The spelling of 85646574542 in words is "eighty-five billion, six hundred forty-six million, five hundred seventy-four thousand, five hundred forty-two".