140379926681 has 4 divisors (see below), whose sum is σ = 140380688052. Its totient is φ = 140379165312.

The previous prime is 140379926671. The next prime is 140379926689. The reversal of 140379926681 is 186629973041.

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 can be written as a sum of positive squares in 2 ways, for example, as 76261584025 + 64118342656 = 276155^2 + 253216^2 .

It is a cyclic number.

It is not a de Polignac number, because 140379926681 - 2²² = 140375732377 is a prime.

It is a super-2 number, since 2×140379926681² (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 (140379926689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89261 + ... + 537333.

It is an arithmetic number, because the mean of its divisors is an integer number (35095172013).

Almost surely, 2^140379926681 is an apocalyptic number.

It is an amenable number.

140379926681 is a deficient number, since it is larger than the sum of its proper divisors (761371).

140379926681 is an equidigital number, since it uses as much as digits as its factorization.

140379926681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761370.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 140379926681 in words is "one hundred forty billion, three hundred seventy-nine million, nine hundred twenty-six thousand, six hundred eighty-one".