1225557035890 has 32 divisors (see below), whose sum is σ = 2421876729024. Its totient is φ = 442818517440.

The previous prime is 1225557035873. The next prime is 1225557035947. The reversal of 1225557035890 is 985307555221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35464984 + ... + 35499523.

It is an arithmetic number, because the mean of its divisors is an integer number (75683647782).

Almost surely, 2^{1225557035890} is an apocalyptic number.

1225557035890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225557035890 is a deficient number, since it is larger than the sum of its proper divisors (1196319693134).

1225557035890 is a wasteful number, since it uses less digits than its factorization.

1225557035890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70964682.

The product of its (nonzero) digits is 3780000, while the sum is 52.

The spelling of 1225557035890 in words is "one trillion, two hundred twenty-five billion, five hundred fifty-seven million, thirty-five thousand, eight hundred ninety".