140543155551421 has 4 divisors (see below), whose sum is σ = 160620749201632. Its totient is φ = 120465561901212.

The previous prime is 140543155551413. The next prime is 140543155551433. The reversal of 140543155551421 is 124155551345041.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 140543155551421 - 2³ = 140543155551413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140543155557421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10038796825095 + ... + 10038796825108.

It is an arithmetic number, because the mean of its divisors is an integer number (40155187300408).

Almost surely, 2^{140543155551421} is an apocalyptic number.

It is an amenable number.

140543155551421 is a deficient number, since it is larger than the sum of its proper divisors (20077593650211).

140543155551421 is an equidigital number, since it uses as much as digits as its factorization.

140543155551421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20077593650210.

The product of its (nonzero) digits is 1200000, while the sum is 46.

The spelling of 140543155551421 in words is "one hundred forty trillion, five hundred forty-three billion, one hundred fifty-five million, five hundred fifty-one thousand, four hundred twenty-one".