85931958440644 has 12 divisors (see below), whose sum is σ = 150380992160784. Its totient is φ = 42965960680424.

The previous prime is 85931958440639. The next prime is 85931958440659. The reversal of 85931958440644 is 44604485913958.

It is a super-2 number, since 2×85931958440644² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16213827 + ... + 20850709.

It is an arithmetic number, because the mean of its divisors is an integer number (12531749346732).

Almost surely, 2^{85931958440644} is an apocalyptic number.

It is an amenable number.

85931958440644 is a deficient number, since it is larger than the sum of its proper divisors (64449033720140).

85931958440644 is a wasteful number, since it uses less digits than its factorization.

85931958440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269954 (or 9269952 counting only the distinct ones).

The product of its (nonzero) digits is 597196800, while the sum is 70.

The spelling of 85931958440644 in words is "eighty-five trillion, nine hundred thirty-one billion, nine hundred fifty-eight million, four hundred forty thousand, six hundred forty-four".