249664553061 has 16 divisors (see below), whose sum is σ = 415026789888. Its totient is φ = 129695871600.

The previous prime is 249664553059. The next prime is 249664553081. The reversal of 249664553061 is 160355466942.

It is not a de Polignac number, because 249664553061 - 2¹ = 249664553059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249664552995 and 249664553013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249664553081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540399235 + ... + 540399696.

It is an arithmetic number, because the mean of its divisors is an integer number (25939174368).

Almost surely, 2^249664553061 is an apocalyptic number.

249664553061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

249664553061 is a deficient number, since it is larger than the sum of its proper divisors (165362236827).

249664553061 is a wasteful number, since it uses less digits than its factorization.

249664553061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080798952.

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 249664553061 in words is "two hundred forty-nine billion, six hundred sixty-four million, five hundred fifty-three thousand, sixty-one".