82907437721990 has 16 divisors (see below), whose sum is σ = 170552443313952. Its totient is φ = 28425407218944.

The previous prime is 82907437721929. The next prime is 82907437722001. The reversal of 82907437721990 is 9912773470928.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 82907437721990.

It is a congruent number.

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, 592195983659 + ... + 592195983798.

It is an arithmetic number, because the mean of its divisors is an integer number (10659527707122).

Almost surely, 2^{82907437721990} is an apocalyptic number.

82907437721990 is an abundant number, since it is smaller than the sum of its proper divisors (87645005591962).

82907437721990 is a wasteful number, since it uses less digits than its factorization.

82907437721990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184391967471.

The product of its (nonzero) digits is 96018048, while the sum is 68.

The spelling of 82907437721990 in words is "eighty-two trillion, nine hundred seven billion, four hundred thirty-seven million, seven hundred twenty-one thousand, nine hundred ninety".