32161393990 has 32 divisors (see below), whose sum is σ = 63163268640.
Its totient is φ = 11693203200.
The previous prime is 32161393969. The next prime is 32161393997. The reversal of 32161393990 is 9939316123.
It is a self number, because there is not a number n which added to its sum of digits gives 32161393990.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (32161393997) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812376 + ... + 851044.
It is an arithmetic number, because the mean of its divisors is an integer number (1973852145).
Almost surely, 232161393990 is an apocalyptic number.
32161393990 is a deficient number, since it is larger than the sum of its proper divisors (31001874650).
32161393990 is a wasteful number, since it uses less digits than its factorization.
32161393990 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 46248.
The product of its (nonzero) digits is 236196, while the sum is 46.
The spelling of 32161393990 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred ninety".