72852465649 has 2 divisors, whose sum is σ = 72852465650. Its totient is φ = 72852465648.

The previous prime is 72852465593. The next prime is 72852465689. The reversal of 72852465649 is 94656425827.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62403537249 + 10448928400 = 249807^2 + 102220^2 .

It is a cyclic number.

It is not a de Polignac number, because 72852465649 - 2³³ = 64262531057 is a prime.

It is a super-2 number, since 2×72852465649² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72852465593 and 72852465602.

It is not a weakly prime, because it can be changed into another prime (72852465689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36426232824 + 36426232825.

It is an arithmetic number, because the mean of its divisors is an integer number (36426232825).

Almost surely, 2^72852465649 is an apocalyptic number.

It is an amenable number.

72852465649 is a deficient number, since it is larger than the sum of its proper divisors (1).

72852465649 is an equidigital number, since it uses as much as digits as its factorization.

72852465649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 58.

The spelling of 72852465649 in words is "seventy-two billion, eight hundred fifty-two million, four hundred sixty-five thousand, six hundred forty-nine".