91547405465 has 8 divisors (see below), whose sum is σ = 113645055240. Its totient is φ = 70712478592.

The previous prime is 91547405459. The next prime is 91547405491. The reversal of 91547405465 is 56450474519.

It can be written as a sum of positive squares in 4 ways, for example, as 11408589721 + 80138815744 = 106811^2 + 283088^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 91547405465 - 2¹⁴ = 91547389081 is a prime.

It is a super-2 number, since 2×91547405465² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315680564 + ... + 315680853.

It is an arithmetic number, because the mean of its divisors is an integer number (14205631905).

Almost surely, 2^91547405465 is an apocalyptic number.

It is an amenable number.

91547405465 is a deficient number, since it is larger than the sum of its proper divisors (22097649775).

91547405465 is a wasteful number, since it uses less digits than its factorization.

91547405465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631361451.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 91547405465 in words is "ninety-one billion, five hundred forty-seven million, four hundred five thousand, four hundred sixty-five".