1401171618 has 32 divisors (see below), whose sum is σ = 3493831680. Its totient is φ = 363940560.

The previous prime is 1401171617. The next prime is 1401171619. The reversal of 1401171618 is 8161711041.

It is an interprime number because it is at equal distance from previous prime (1401171617) and next prime (1401171619).

It is not an unprimeable number, because it can be changed into a prime (1401171617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1515958 + ... + 1516881.

It is an arithmetic number, because the mean of its divisors is an integer number (109182240).

Almost surely, 2^1401171618 is an apocalyptic number.

1401171618 is an abundant number, since it is smaller than the sum of its proper divisors (2092660062).

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

1401171618 is a wasteful number, since it uses less digits than its factorization.

1401171618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032862.

The product of its (nonzero) digits is 1344, while the sum is 30.

The square root of 1401171618 is about 37432.2269976019. The cubic root of 1401171618 is about 1119.0009208073. Note that the first 3 decimals are identical.

Adding to 1401171618 its reverse (8161711041), we get a palindrome (9562882659).

The spelling of 1401171618 in words is "one billion, four hundred one million, one hundred seventy-one thousand, six hundred eighteen".