249749660097 has 48 divisors (see below), whose sum is σ = 428406451200. Its totient is φ = 142429877712.

The previous prime is 249749660087. The next prime is 249749660113. The reversal of 249749660097 is 790066947942.

It is not a de Polignac number, because 249749660097 - 2¹¹ = 249749658049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (249749660077) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 709654 + ... + 1001552.

It is an arithmetic number, because the mean of its divisors is an integer number (8925134400).

Almost surely, 2^249749660097 is an apocalyptic number.

249749660097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

249749660097 is a deficient number, since it is larger than the sum of its proper divisors (178656791103).

249749660097 is an equidigital number, since it uses as much as digits as its factorization.

249749660097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292424 (or 292412 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 249749660097 in words is "two hundred forty-nine billion, seven hundred forty-nine million, six hundred sixty thousand, ninety-seven".