721533527145742 has 8 divisors (see below), whose sum is σ = 1089467842313232. Its totient is φ = 358377579708000.

The previous prime is 721533527145649. The next prime is 721533527145757. The reversal of 721533527145742 is 247541725335127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×721533527145742² (a number of 31 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194591932059 + ... + 1194591932662.

It is an arithmetic number, because the mean of its divisors is an integer number (136183480289154).

Almost surely, 2^{721533527145742} is an apocalyptic number.

721533527145742 is a deficient number, since it is larger than the sum of its proper divisors (367934315167490).

721533527145742 is a wasteful number, since it uses less digits than its factorization.

721533527145742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389183864874.

The product of its digits is 49392000, while the sum is 58.

The spelling of 721533527145742 in words is "seven hundred twenty-one trillion, five hundred thirty-three billion, five hundred twenty-seven million, one hundred forty-five thousand, seven hundred forty-two".