721374040740 has 24 divisors (see below), whose sum is σ = 2019847314240. Its totient is φ = 192366410848.

The previous prime is 721374040733. The next prime is 721374040787. The reversal of 721374040740 is 47040473127.

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, 6011450280 + ... + 6011450399.

It is an arithmetic number, because the mean of its divisors is an integer number (84160304760).

Almost surely, 2^721374040740 is an apocalyptic number.

It is an amenable number.

721374040740 is an abundant number, since it is smaller than the sum of its proper divisors (1298473273500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721374040740 is a wasteful number, since it uses less digits than its factorization.

721374040740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12022900691 (or 12022900689 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 39.

The spelling of 721374040740 in words is "seven hundred twenty-one billion, three hundred seventy-four million, forty thousand, seven hundred forty".