85990924772 has 6 divisors (see below), whose sum is σ = 150484118358. Its totient is φ = 42995462384.

The previous prime is 85990924771. The next prime is 85990924819. The reversal of 85990924772 is 27742909958.

It can be written as a sum of positive squares in only one way, i.e., 68468048896 + 17522875876 = 261664^2 + 132374^2 .

It is not an unprimeable number, because it can be changed into a prime (85990924771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10748865593 + ... + 10748865600.

It is an arithmetic number, because the mean of its divisors is an integer number (25080686393).

Almost surely, 2^85990924772 is an apocalyptic number.

It is an amenable number.

85990924772 is a deficient number, since it is larger than the sum of its proper divisors (64493193586).

85990924772 is a wasteful number, since it uses less digits than its factorization.

85990924772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21497731197 (or 21497731195 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 85990924772 in words is "eighty-five billion, nine hundred ninety million, nine hundred twenty-four thousand, seven hundred seventy-two".