72000077998997 has 2 divisors, whose sum is σ = 72000077998998. Its totient is φ = 72000077998996.

The previous prime is 72000077998963. The next prime is 72000077999051. The reversal of 72000077998997 is 79989977000027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66032542333681 + 5967535665316 = 8126041^2 + 2442854^2 .

It is a cyclic number.

It is not a de Polignac number, because 72000077998997 - 2²² = 72000073804693 is a prime.

It is a super-2 number, since 2×72000077998997² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72090077998997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36000038999498 + 36000038999499.

It is an arithmetic number, because the mean of its divisors is an integer number (36000038999499).

Almost surely, 2^{72000077998997} is an apocalyptic number.

It is an amenable number.

72000077998997 is a deficient number, since it is larger than the sum of its proper divisors (1).

72000077998997 is an equidigital number, since it uses as much as digits as its factorization.

72000077998997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252047376, while the sum is 74.

The spelling of 72000077998997 in words is "seventy-two trillion, seventy-seven million, nine hundred ninety-eight thousand, nine hundred ninety-seven".