140564441661 has 16 divisors (see below), whose sum is σ = 216600105600. Its totient is φ = 79420036608.

The previous prime is 140564441657. The next prime is 140564441663. The reversal of 140564441661 is 166144465041.

It is not a de Polignac number, because 140564441661 - 2² = 140564441657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140564441663) 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, 37602316 + ... + 37606053.

It is an arithmetic number, because the mean of its divisors is an integer number (13537506600).

Almost surely, 2^140564441661 is an apocalyptic number.

It is an amenable number.

140564441661 is a deficient number, since it is larger than the sum of its proper divisors (76035663939).

140564441661 is an equidigital number, since it uses as much as digits as its factorization.

140564441661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75208468.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 140564441661 in words is "one hundred forty billion, five hundred sixty-four million, four hundred forty-one thousand, six hundred sixty-one".