721635053362045 has 8 divisors (see below), whose sum is σ = 865963550281824. Its totient is φ = 577307051858064.

The previous prime is 721635053362037. The next prime is 721635053362057. The reversal of 721635053362045 is 540263350536127.

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

It is a cyclic number.

It is not a de Polignac number, because 721635053362045 - 2³ = 721635053362037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721635053361983 and 721635053362001.

It is a congruent number.

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, 120641799 + ... + 126482068.

It is an arithmetic number, because the mean of its divisors is an integer number (108245443785228).

Almost surely, 2^{721635053362045} is an apocalyptic number.

It is an amenable number.

721635053362045 is a deficient number, since it is larger than the sum of its proper divisors (144328496919779).

721635053362045 is a wasteful number, since it uses less digits than its factorization.

721635053362045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247707899.

The product of its (nonzero) digits is 13608000, while the sum is 52.

The spelling of 721635053362045 in words is "seven hundred twenty-one trillion, six hundred thirty-five billion, fifty-three million, three hundred sixty-two thousand, forty-five".