722873513881 has 2 divisors, whose sum is σ = 722873513882. Its totient is φ = 722873513880.

The previous prime is 722873513827. The next prime is 722873513911. The reversal of 722873513881 is 188315378227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467630307225 + 255243206656 = 683835^2 + 505216^2 .

It is a cyclic number.

It is not a de Polignac number, because 722873513881 - 2¹³ = 722873505689 is a prime.

It is a super-2 number, since 2×722873513881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (722873513821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361436756940 + 361436756941.

It is an arithmetic number, because the mean of its divisors is an integer number (361436756941).

Almost surely, 2^722873513881 is an apocalyptic number.

It is an amenable number.

722873513881 is a deficient number, since it is larger than the sum of its proper divisors (1).

722873513881 is an equidigital number, since it uses as much as digits as its factorization.

722873513881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 55.

The spelling of 722873513881 in words is "seven hundred twenty-two billion, eight hundred seventy-three million, five hundred thirteen thousand, eight hundred eighty-one".