581161400949 has 8 divisors (see below), whose sum is σ = 774971910720. Its totient is φ = 387395912576.

The previous prime is 581161400899. The next prime is 581161400993. The reversal of 581161400949 is 949004161185.

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 581161400949 - 2²⁵ = 581127846517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 581161400898 and 581161400907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581161400999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11225217 + ... + 11276870.

It is an arithmetic number, because the mean of its divisors is an integer number (96871488840).

Almost surely, 2^581161400949 is an apocalyptic number.

It is an amenable number.

581161400949 is a deficient number, since it is larger than the sum of its proper divisors (193810509771).

581161400949 is a wasteful number, since it uses less digits than its factorization.

581161400949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22510699.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 581161400949 in words is "five hundred eighty-one billion, one hundred sixty-one million, four hundred thousand, nine hundred forty-nine".