21425468875755 has 32 divisors (see below), whose sum is σ = 39178211493888. Its totient is φ = 9794447241600.

The previous prime is 21425468875739. The next prime is 21425468875819. The reversal of 21425468875755 is 55757886452412.

It is not a de Polignac number, because 21425468875755 - 2⁴ = 21425468875739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21425468875755.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24359545 + ... + 25223765.

It is an arithmetic number, because the mean of its divisors is an integer number (1224319109184).

Almost surely, 2^{21425468875755} is an apocalyptic number.

21425468875755 is a deficient number, since it is larger than the sum of its proper divisors (17752742618133).

21425468875755 is a wasteful number, since it uses less digits than its factorization.

21425468875755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100347.

The product of its digits is 752640000, while the sum is 69.

The spelling of 21425468875755 in words is "twenty-one trillion, four hundred twenty-five billion, four hundred sixty-eight million, eight hundred seventy-five thousand, seven hundred fifty-five".