140144660881 has 3 divisors (see below), whose sum is σ = 140145035241. Its totient is φ = 140144286522.

The previous prime is 140144660867. The next prime is 140144660891. The reversal of 140144660881 is 188066441041.

The square root of 140144660881 is 374359.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 140144660881 - 2⁵ = 140144660849 is a prime.

It is a super-2 number, since 2×140144660881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140144660861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 187180 + ... + 561538.

It is an arithmetic number, because the mean of its divisors is an integer number (46715011747).

Almost surely, 2^140144660881 is an apocalyptic number.

140144660881 is the 374359-th square number.

140144660881 is the 187180-th centered octagonal number.

It is an amenable number.

140144660881 is a deficient number, since it is larger than the sum of its proper divisors (374360).

140144660881 is an frugal number, since it uses more digits than its factorization.

140144660881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748718 (or 374359 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

It can be divided in two parts, 140144 and 660881, that added together give a square (801025 = 895²).

The spelling of 140144660881 in words is "one hundred forty billion, one hundred forty-four million, six hundred sixty thousand, eight hundred eighty-one".