1401215664 has 40 divisors (see below), whose sum is σ = 3625482240. Its totient is φ = 466339648.

The previous prime is 1401215659. The next prime is 1401215719. The reversal of 1401215664 is 4665121041.

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, 8497 + ... + 53615.

It is an arithmetic number, because the mean of its divisors is an integer number (90637056).

Almost surely, 2^1401215664 is an apocalyptic number.

It is an amenable number.

1401215664 is an abundant number, since it is smaller than the sum of its proper divisors (2224266576).

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

1401215664 is a wasteful number, since it uses less digits than its factorization.

1401215664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45777 (or 45771 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1401215664 is about 37432.8153362795. The cubic root of 1401215664 is about 1119.0126459944.

The spelling of 1401215664 in words is "one billion, four hundred one million, two hundred fifteen thousand, six hundred sixty-four".