140189587561 has 9 divisors (see below), whose sum is σ = 145201651543. Its totient is φ = 135344980120.

The previous prime is 140189587541. The next prime is 140189587567. The reversal of 140189587561 is 165785981041.

The square root of 140189587561 is 374419.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 73512019161 + 66677568400 = 271131^2 + 258220^2 .

It is a de Polignac number, because none of the positive numbers 2^k-140189587561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140189587567) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10851696 + ... + 10864606.

Almost surely, 2^140189587561 is an apocalyptic number.

140189587561 is the 374419-th square number.

140189587561 is the 187210-th centered octagonal number.

It is an amenable number.

140189587561 is a deficient number, since it is larger than the sum of its proper divisors (5012063982).

140189587561 is an frugal number, since it uses more digits than its factorization.

140189587561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25880 (or 12940 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 140189587561 in words is "one hundred forty billion, one hundred eighty-nine million, five hundred eighty-seven thousand, five hundred sixty-one".