2140145637261 has 4 divisors (see below), whose sum is σ = 2853527516352. Its totient is φ = 1426763758172.

The previous prime is 2140145637241. The next prime is 2140145637281. The reversal of 2140145637261 is 1627365410412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2140145637241) and next prime (2140145637281).

It is a cyclic number.

It is not a de Polignac number, because 2140145637261 - 2¹¹ = 2140145635213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140145637211) 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, 356690939541 + ... + 356690939546.

It is an arithmetic number, because the mean of its divisors is an integer number (713381879088).

Almost surely, 2^{2140145637261} is an apocalyptic number.

It is an amenable number.

2140145637261 is a deficient number, since it is larger than the sum of its proper divisors (713381879091).

2140145637261 is an equidigital number, since it uses as much as digits as its factorization.

2140145637261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713381879090.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 2140145637261 in words is "two trillion, one hundred forty billion, one hundred forty-five million, six hundred thirty-seven thousand, two hundred sixty-one".