720721993674 has 32 divisors (see below), whose sum is σ = 1480677891840. Its totient is φ = 233704101312.

The previous prime is 720721993609. The next prime is 720721993723. The reversal of 720721993674 is 476399127027.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901807 + ... + 1501565.

It is an arithmetic number, because the mean of its divisors is an integer number (46271184120).

Almost surely, 2^720721993674 is an apocalyptic number.

720721993674 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

720721993674 is an abundant number, since it is smaller than the sum of its proper divisors (759955898166).

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

720721993674 is a wasteful number, since it uses less digits than its factorization.

720721993674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605214.

The product of its (nonzero) digits is 8001504, while the sum is 57.

The spelling of 720721993674 in words is "seven hundred twenty billion, seven hundred twenty-one million, nine hundred ninety-three thousand, six hundred seventy-four".