90777026629491 has 4 divisors (see below), whose sum is σ = 121036035505992. Its totient is φ = 60518017752992.

The previous prime is 90777026629481. The next prime is 90777026629561. The reversal of 90777026629491 is 19492662077709.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90777026629491 - 2¹⁷ = 90777026498419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90777026629481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15129504438246 + ... + 15129504438251.

It is an arithmetic number, because the mean of its divisors is an integer number (30259008876498).

Almost surely, 2^{90777026629491} is an apocalyptic number.

90777026629491 is a deficient number, since it is larger than the sum of its proper divisors (30259008876501).

90777026629491 is a wasteful number, since it uses less digits than its factorization.

90777026629491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30259008876500.

The product of its (nonzero) digits is 144027072, while the sum is 69.

The spelling of 90777026629491 in words is "ninety trillion, seven hundred seventy-seven billion, twenty-six million, six hundred twenty-nine thousand, four hundred ninety-one".