722645238040 has 32 divisors (see below), whose sum is σ = 1773765585360. Its totient is φ = 262780086400.

The previous prime is 722645238031. The next prime is 722645238079. The reversal of 722645238040 is 40832546227.

It is a super-2 number, since 2×722645238040² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821187331 + ... + 821188210.

Almost surely, 2^722645238040 is an apocalyptic number.

It is an amenable number.

722645238040 is an abundant number, since it is smaller than the sum of its proper divisors (1051120347320).

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

722645238040 is a wasteful number, since it uses less digits than its factorization.

722645238040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642375563 (or 1642375559 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 722645238040 in words is "seven hundred twenty-two billion, six hundred forty-five million, two hundred thirty-eight thousand, forty".