721188248851 has 8 divisors (see below), whose sum is σ = 826389854720. Its totient is φ = 616530321288.

The previous prime is 721188248831. The next prime is 721188248867. The reversal of 721188248851 is 158842881127.

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

It is not a de Polignac number, because 721188248851 - 2⁷ = 721188248723 is a prime.

It is a super-2 number, since 2×721188248851² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721188248792 and 721188248801.

It is not an unprimeable number, because it can be changed into a prime (721188248821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135916731 + ... + 135922036.

It is an arithmetic number, because the mean of its divisors is an integer number (103298731840).

Almost surely, 2^721188248851 is an apocalyptic number.

721188248851 is a deficient number, since it is larger than the sum of its proper divisors (105201605869).

721188248851 is a wasteful number, since it uses less digits than its factorization.

721188248851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271839153.

The product of its digits is 2293760, while the sum is 55.

The spelling of 721188248851 in words is "seven hundred twenty-one billion, one hundred eighty-eight million, two hundred forty-eight thousand, eight hundred fifty-one".