1401668918 has 16 divisors (see below), whose sum is σ = 2270071440. Its totient is φ = 645256416.

The previous prime is 1401668903. The next prime is 1401668923. The reversal of 1401668918 is 8198661041.

It is a congruent number.

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, 59180 + ... + 79407.

It is an arithmetic number, because the mean of its divisors is an integer number (141879465).

Almost surely, 2^1401668918 is an apocalyptic number.

1401668918 is a deficient number, since it is larger than the sum of its proper divisors (868402522).

1401668918 is a wasteful number, since it uses less digits than its factorization.

1401668918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138991.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 1401668918 is about 37438.8690801418. The cubic root of 1401668918 is about 1119.1332893978.

The spelling of 1401668918 in words is "one billion, four hundred one million, six hundred sixty-eight thousand, nine hundred eighteen".