85398155972 has 24 divisors (see below), whose sum is σ = 157323096000. Its totient is φ = 40449005856.

The previous prime is 85398155917. The next prime is 85398155987. The reversal of 85398155972 is 27955189358.

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, 1480529 + ... + 1537127.

It is an arithmetic number, because the mean of its divisors is an integer number (6555129000).

Almost surely, 2^85398155972 is an apocalyptic number.

It is an amenable number.

85398155972 is a deficient number, since it is larger than the sum of its proper divisors (71924940028).

85398155972 is a wasteful number, since it uses less digits than its factorization.

85398155972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76475 (or 76473 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 62.

The spelling of 85398155972 in words is "eighty-five billion, three hundred ninety-eight million, one hundred fifty-five thousand, nine hundred seventy-two".