140478729477 has 4 divisors (see below), whose sum is σ = 187304972640. Its totient is φ = 93652486316.

The previous prime is 140478729431. The next prime is 140478729491. The reversal of 140478729477 is 774927874041.

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 140478729477 - 2¹⁸ = 140478467333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140478729477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140478729877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23413121577 + ... + 23413121582.

It is an arithmetic number, because the mean of its divisors is an integer number (46826243160).

Almost surely, 2^140478729477 is an apocalyptic number.

It is an amenable number.

140478729477 is a deficient number, since it is larger than the sum of its proper divisors (46826243163).

140478729477 is an equidigital number, since it uses as much as digits as its factorization.

140478729477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46826243162.

The product of its (nonzero) digits is 22127616, while the sum is 60.

The spelling of 140478729477 in words is "one hundred forty billion, four hundred seventy-eight million, seven hundred twenty-nine thousand, four hundred seventy-seven".