23729621755 has 24 divisors (see below), whose sum is σ = 34564823712. Its totient is φ = 15564269952.

The previous prime is 23729621711. The next prime is 23729621777. The reversal of 23729621755 is 55712692732.

It is not a de Polignac number, because 23729621755 - 2¹³ = 23729613563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23729621699 and 23729621708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2099922 + ... + 2111191.

It is an arithmetic number, because the mean of its divisors is an integer number (1440200988).

Almost surely, 2^23729621755 is an apocalyptic number.

23729621755 is a deficient number, since it is larger than the sum of its proper divisors (10835201957).

23729621755 is a wasteful number, since it uses less digits than its factorization.

23729621755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211155 (or 4211148 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 49.

The spelling of 23729621755 in words is "twenty-three billion, seven hundred twenty-nine million, six hundred twenty-one thousand, seven hundred fifty-five".