22542128477 has 4 divisors (see below), whose sum is σ = 24591412896. Its totient is φ = 20492844060.

The previous prime is 22542128461. The next prime is 22542128501. The reversal of 22542128477 is 77482124522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22542128477 - 2⁴ = 22542128461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22542128977) 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, 1024642193 + ... + 1024642214.

It is an arithmetic number, because the mean of its divisors is an integer number (6147853224).

Almost surely, 2^22542128477 is an apocalyptic number.

It is an amenable number.

22542128477 is a deficient number, since it is larger than the sum of its proper divisors (2049284419).

22542128477 is a wasteful number, since it uses less digits than its factorization.

22542128477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049284418.

The product of its digits is 501760, while the sum is 44.

The spelling of 22542128477 in words is "twenty-two billion, five hundred forty-two million, one hundred twenty-eight thousand, four hundred seventy-seven".