72175776377 has 2 divisors, whose sum is σ = 72175776378. Its totient is φ = 72175776376.

The previous prime is 72175776373. The next prime is 72175776391. The reversal of 72175776377 is 77367757127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39015730576 + 33160045801 = 197524^2 + 182099^2 .

It is a cyclic number.

It is not a de Polignac number, because 72175776377 - 2² = 72175776373 is a prime.

It is a super-2 number, since 2×72175776377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72175776371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36087888188 + 36087888189.

It is an arithmetic number, because the mean of its divisors is an integer number (36087888189).

Almost surely, 2^72175776377 is an apocalyptic number.

It is an amenable number.

72175776377 is a deficient number, since it is larger than the sum of its proper divisors (1).

72175776377 is an equidigital number, since it uses as much as digits as its factorization.

72175776377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21176820, while the sum is 59.

The spelling of 72175776377 in words is "seventy-two billion, one hundred seventy-five million, seven hundred seventy-six thousand, three hundred seventy-seven".