90154612277 has 2 divisors, whose sum is σ = 90154612278. Its totient is φ = 90154612276.

The previous prime is 90154612259. The next prime is 90154612283. The reversal of 90154612277 is 77221645109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83663248516 + 6491363761 = 289246^2 + 80569^2 .

It is a cyclic number.

It is not a de Polignac number, because 90154612277 - 2⁶ = 90154612213 is a prime.

It is a super-2 number, since 2×90154612277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90154612237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45077306138 + 45077306139.

It is an arithmetic number, because the mean of its divisors is an integer number (45077306139).

Almost surely, 2^90154612277 is an apocalyptic number.

It is an amenable number.

90154612277 is a deficient number, since it is larger than the sum of its proper divisors (1).

90154612277 is an equidigital number, since it uses as much as digits as its factorization.

90154612277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 90154612277 in words is "ninety billion, one hundred fifty-four million, six hundred twelve thousand, two hundred seventy-seven".