90772141567787 has 2 divisors, whose sum is σ = 90772141567788. Its totient is φ = 90772141567786.

The previous prime is 90772141567697. The next prime is 90772141567817. The reversal of 90772141567787 is 78776514127709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90772141567787 - 2²⁰ = 90772140519211 is a prime.

It is a super-4 number, since 4×90772141567787⁴ (a number of 57 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90772141567787.

It is not a weakly prime, because it can be changed into another prime (90772141567487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45386070783893 + 45386070783894.

It is an arithmetic number, because the mean of its divisors is an integer number (45386070783894).

Almost surely, 2^{90772141567787} is an apocalyptic number.

90772141567787 is a deficient number, since it is larger than the sum of its proper divisors (1).

90772141567787 is an equidigital number, since it uses as much as digits as its factorization.

90772141567787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290424960, while the sum is 71.

The spelling of 90772141567787 in words is "ninety trillion, seven hundred seventy-two billion, one hundred forty-one million, five hundred sixty-seven thousand, seven hundred eighty-seven".