140556605421 has 8 divisors (see below), whose sum is σ = 198432854784. Its totient is φ = 88192379840.

The previous prime is 140556605407. The next prime is 140556605447. The reversal of 140556605421 is 124506655041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140556605421 - 2²² = 140552411117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140556605421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140556605521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378005885 + ... + 1378005986.

It is an arithmetic number, because the mean of its divisors is an integer number (24804106848).

Almost surely, 2^140556605421 is an apocalyptic number.

It is an amenable number.

140556605421 is a deficient number, since it is larger than the sum of its proper divisors (57876249363).

140556605421 is a wasteful number, since it uses less digits than its factorization.

140556605421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756011891.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 140556605421 in words is "one hundred forty billion, five hundred fifty-six million, six hundred five thousand, four hundred twenty-one".