1982155266 has 64 divisors (see below), whose sum is σ = 5421292800. Its totient is φ = 522764928.

The previous prime is 1982155243. The next prime is 1982155271. The reversal of 1982155266 is 6625512891.

1982155266 is a `hidden beast` number, since 1 + 98 + 2 + 1 + 552 + 6 + 6 = 666.

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, 196771 + ... + 206598.

It is an arithmetic number, because the mean of its divisors is an integer number (84707700).

Almost surely, 2^1982155266 is an apocalyptic number.

1982155266 is an abundant number, since it is smaller than the sum of its proper divisors (3439137534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1982155266 is a wasteful number, since it uses less digits than its factorization.

1982155266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403400 (or 403394 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1982155266 is about 44521.4023364045. The cubic root of 1982155266 is about 1256.1626904792.

The spelling of 1982155266 in words is "one billion, nine hundred eighty-two million, one hundred fifty-five thousand, two hundred sixty-six".