23478748921649 has 16 divisors (see below), whose sum is σ = 27758435061120. Its totient is φ = 19430472983040.

The previous prime is 23478748921637. The next prime is 23478748921657. The reversal of 23478748921649 is 94612984787432.

It is a happy number.

It is not a de Polignac number, because 23478748921649 - 2⁴ = 23478748921633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23478748921619) 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, 19187042 + ... + 20374004.

It is an arithmetic number, because the mean of its divisors is an integer number (1734902191320).

Almost surely, 2^{23478748921649} is an apocalyptic number.

23478748921649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

23478748921649 is a deficient number, since it is larger than the sum of its proper divisors (4279686139471).

23478748921649 is a wasteful number, since it uses less digits than its factorization.

23478748921649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284440.

The product of its digits is 1170505728, while the sum is 74.

The spelling of 23478748921649 in words is "twenty-three trillion, four hundred seventy-eight billion, seven hundred forty-eight million, nine hundred twenty-one thousand, six hundred forty-nine".