72077162449 has 2 divisors, whose sum is σ = 72077162450. Its totient is φ = 72077162448.

The previous prime is 72077162363. The next prime is 72077162477. The reversal of 72077162449 is 94426177027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40128102400 + 31949060049 = 200320^2 + 178743^2 .

It is a cyclic number.

It is not a de Polignac number, because 72077162449 - 2²¹ = 72075065297 is a prime.

It is not a weakly prime, because it can be changed into another prime (72077162149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36038581224 + 36038581225.

It is an arithmetic number, because the mean of its divisors is an integer number (36038581225).

Almost surely, 2^72077162449 is an apocalyptic number.

It is an amenable number.

72077162449 is a deficient number, since it is larger than the sum of its proper divisors (1).

72077162449 is an equidigital number, since it uses as much as digits as its factorization.

72077162449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 72077162449 in words is "seventy-two billion, seventy-seven million, one hundred sixty-two thousand, four hundred forty-nine".