91545454 has 48 divisors (see below), whose sum is σ = 185812704. Its totient is φ = 32915520.

The previous prime is 91545427. The next prime is 91545463. The reversal of 91545454 is 45454519.

It is a super-2 number, since 2×91545454² = 16761140296132232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19944 + ... + 24100.

It is an arithmetic number, because the mean of its divisors is an integer number (3871098).

Almost surely, 2^91545454 is an apocalyptic number.

91545454 is an abundant number, since it is smaller than the sum of its proper divisors (94267250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91545454 is a wasteful number, since it uses less digits than its factorization.

91545454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4190 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 91545454 is about 9567.9388585003. The cubic root of 91545454 is about 450.6910436038.

It can be divided in two parts, 91 and 545454, that added together give a palindrome (545545).

The spelling of 91545454 in words is "ninety-one million, five hundred forty-five thousand, four hundred fifty-four".