23898878477 has 4 divisors (see below), whose sum is σ = 25304694876. Its totient is φ = 22493062080.

The previous prime is 23898878461. The next prime is 23898878489. The reversal of 23898878477 is 77487889832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10468154596 + 13430723881 = 102314^2 + 115891^2 .

It is a cyclic number.

It is not a de Polignac number, because 23898878477 - 2⁴ = 23898878461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23898878477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898878417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702908174 + ... + 702908207.

It is an arithmetic number, because the mean of its divisors is an integer number (6326173719).

Almost surely, 2^23898878477 is an apocalyptic number.

It is an amenable number.

23898878477 is a deficient number, since it is larger than the sum of its proper divisors (1405816399).

23898878477 is a wasteful number, since it uses less digits than its factorization.

23898878477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405816398.

The product of its digits is 303464448, while the sum is 71.

The spelling of 23898878477 in words is "twenty-three billion, eight hundred ninety-eight million, eight hundred seventy-eight thousand, four hundred seventy-seven".