91009095490 has 8 divisors (see below), whose sum is σ = 163816371900. Its totient is φ = 36403638192.

The previous prime is 91009095469. The next prime is 91009095497. The reversal of 91009095490 is 9459090019.

It can be written as a sum of positive squares in 2 ways, for example, as 77990057289 + 13019038201 = 279267^2 + 114101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 91009095490.

It is not an unprimeable number, because it can be changed into a prime (91009095497) 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, 4550454765 + ... + 4550454784.

Almost surely, 2^91009095490 is an apocalyptic number.

91009095490 is a deficient number, since it is larger than the sum of its proper divisors (72807276410).

91009095490 is a wasteful number, since it uses less digits than its factorization.

91009095490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100909556.

The product of its (nonzero) digits is 131220, while the sum is 46.

The spelling of 91009095490 in words is "ninety-one billion, nine million, ninety-five thousand, four hundred ninety".