25550145442 has 16 divisors (see below), whose sum is σ = 40017317760. Its totient is φ = 12219273808.

The previous prime is 25550145407. The next prime is 25550145473. The reversal of 25550145442 is 24454105552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052298 + ... + 2064709.

It is an arithmetic number, because the mean of its divisors is an integer number (2501082360).

Almost surely, 2^25550145442 is an apocalyptic number.

25550145442 is a deficient number, since it is larger than the sum of its proper divisors (14467172318).

25550145442 is a wasteful number, since it uses less digits than its factorization.

25550145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117145.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 25550145442 in words is "twenty-five billion, five hundred fifty million, one hundred forty-five thousand, four hundred forty-two".