1240172778445 has 8 divisors (see below), whose sum is σ = 1488307632480. Its totient is φ = 992071357200.

The previous prime is 1240172778389. The next prime is 1240172778451. The reversal of 1240172778445 is 5448772710421.

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

It is not a de Polignac number, because 1240172778445 - 2¹³ = 1240172770253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240172778392 and 1240172778401.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8276515 + ... + 8425024.

It is an arithmetic number, because the mean of its divisors is an integer number (186038454060).

Almost surely, 2^{1240172778445} is an apocalyptic number.

It is an amenable number.

1240172778445 is a deficient number, since it is larger than the sum of its proper divisors (248134854035).

1240172778445 is a wasteful number, since it uses less digits than its factorization.

1240172778445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16716395.

The product of its (nonzero) digits is 3512320, while the sum is 52.

The spelling of 1240172778445 in words is "one trillion, two hundred forty billion, one hundred seventy-two million, seven hundred seventy-eight thousand, four hundred forty-five".