721543634731010 has 128 divisors (see below), whose sum is σ = 1613488595410944. Its totient is φ = 226215102355200.

The previous prime is 721543634730983. The next prime is 721543634731033. The reversal of 721543634731010 is 10137436345127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3500445809 + ... + 3500651931.

It is an arithmetic number, because the mean of its divisors is an integer number (12605379651648).

Almost surely, 2^{721543634731010} is an apocalyptic number.

721543634731010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

721543634731010 is an abundant number, since it is smaller than the sum of its proper divisors (891944960679934).

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

721543634731010 is a wasteful number, since it uses less digits than its factorization.

721543634731010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242208.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 721543634731010 in words is "seven hundred twenty-one trillion, five hundred forty-three billion, six hundred thirty-four million, seven hundred thirty-one thousand, ten".