140653561 has 8 divisors (see below), whose sum is σ = 148201920. Its totient is φ = 133119792.

The previous prime is 140653537. The next prime is 140653571. The reversal of 140653561 is 165356041.

140653561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 140653561 - 2¹¹ = 140651513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140653501) 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, 20211 + ... + 26263.

It is an arithmetic number, because the mean of its divisors is an integer number (18525240).

Almost surely, 2^140653561 is an apocalyptic number.

It is an amenable number.

140653561 is a deficient number, since it is larger than the sum of its proper divisors (7548359).

140653561 is a wasteful number, since it uses less digits than its factorization.

140653561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 140653561 is about 11859.7454019890. The cubic root of 140653561 is about 520.0561588756.

It can be divided in two parts, 1406535 and 61, that added together give a square (1406596 = 1186²).

The spelling of 140653561 in words is "one hundred forty million, six hundred fifty-three thousand, five hundred sixty-one".