655360091 has 4 divisors (see below), whose sum is σ = 683854032. Its totient is φ = 626866152.

The previous prime is 655360061. The next prime is 655360093. The reversal of 655360091 is 190063556.

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 655360091 - 2¹⁴ = 655343707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655360093) 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, 14246936 + ... + 14246981.

It is an arithmetic number, because the mean of its divisors is an integer number (170963508).

Almost surely, 2^655360091 is an apocalyptic number.

655360091 is a deficient number, since it is larger than the sum of its proper divisors (28493941).

655360091 is a wasteful number, since it uses less digits than its factorization.

655360091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28493940.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 655360091 is about 25600.0017773437. The cubic root of 655360091 is about 868.6136775141.

The spelling of 655360091 in words is "six hundred fifty-five million, three hundred sixty thousand, ninety-one".