1401161511566 has 32 divisors (see below), whose sum is σ = 2228389812000. Its totient is φ = 658903956480.

The previous prime is 1401161511523. The next prime is 1401161511569. The reversal of 1401161511566 is 6651151611041.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401161511569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10766726 + ... + 10896086.

It is an arithmetic number, because the mean of its divisors is an integer number (69637181625).

Almost surely, 2^{1401161511566} is an apocalyptic number.

1401161511566 is a deficient number, since it is larger than the sum of its proper divisors (827228300434).

1401161511566 is a wasteful number, since it uses less digits than its factorization.

1401161511566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131444.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 1401161511566 in words is "one trillion, four hundred one billion, one hundred sixty-one million, five hundred eleven thousand, five hundred sixty-six".