23398991049 has 16 divisors (see below), whose sum is σ = 35660943360. Its totient is φ = 13368850320.

The previous prime is 23398990997. The next prime is 23398991101. The reversal of 23398991049 is 94019989332.

It is an interprime number because it is at equal distance from previous prime (23398990997) and next prime (23398991101).

It is not a de Polignac number, because 23398991049 - 2¹¹ = 23398989001 is a prime.

It is a super-2 number, since 2×23398991049² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23398991049.

It is not an unprimeable number, because it can be changed into a prime (23398991149) 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, 66472 + ... + 226310.

It is an arithmetic number, because the mean of its divisors is an integer number (2228808960).

Almost surely, 2^23398991049 is an apocalyptic number.

It is an amenable number.

23398991049 is a deficient number, since it is larger than the sum of its proper divisors (12261952311).

23398991049 is a wasteful number, since it uses less digits than its factorization.

23398991049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166820.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The spelling of 23398991049 in words is "twenty-three billion, three hundred ninety-eight million, nine hundred ninety-one thousand, forty-nine".