613257903091 has 4 divisors (see below), whose sum is σ = 613564074792. Its totient is φ = 612951731392.

The previous prime is 613257903053. The next prime is 613257903101. The reversal of 613257903091 is 190309752316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613257903091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613257906091) 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, 153082846 + ... + 153086851.

It is an arithmetic number, because the mean of its divisors is an integer number (153391018698).

Almost surely, 2^613257903091 is an apocalyptic number.

613257903091 is a deficient number, since it is larger than the sum of its proper divisors (306171701).

613257903091 is a wasteful number, since it uses less digits than its factorization.

613257903091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306171700.

The product of its (nonzero) digits is 306180, while the sum is 46.

The spelling of 613257903091 in words is "six hundred thirteen billion, two hundred fifty-seven million, nine hundred three thousand, ninety-one".