249349045557 has 8 divisors (see below), whose sum is σ = 332468379040. Its totient is φ = 166231204560.

The previous prime is 249349045537. The next prime is 249349045591. The reversal of 249349045557 is 755540943942.

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

It is not a de Polignac number, because 249349045557 - 2¹⁸ = 249348783413 is a prime.

It is a super-2 number, since 2×249349045557² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249349045497 and 249349045506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249349045537) 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, 103794 + ... + 713772.

It is an arithmetic number, because the mean of its divisors is an integer number (41558547380).

Almost surely, 2^249349045557 is an apocalyptic number.

It is an amenable number.

249349045557 is a deficient number, since it is larger than the sum of its proper divisors (83119333483).

249349045557 is a wasteful number, since it uses less digits than its factorization.

249349045557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746243.

The product of its (nonzero) digits is 27216000, while the sum is 57.

The spelling of 249349045557 in words is "two hundred forty-nine billion, three hundred forty-nine million, forty-five thousand, five hundred fifty-seven".