7701440020145 has 4 divisors (see below), whose sum is σ = 9241728024180. Its totient is φ = 6161152016112.

The previous prime is 7701440020139. The next prime is 7701440020177. The reversal of 7701440020145 is 5410200441077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5745604206001 + 1955835814144 = 2396999^2 + 1398512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7701440020145 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770144002010 + ... + 770144002019.

It is an arithmetic number, because the mean of its divisors is an integer number (2310432006045).

Almost surely, 2^{7701440020145} is an apocalyptic number.

It is an amenable number.

7701440020145 is a deficient number, since it is larger than the sum of its proper divisors (1540288004035).

7701440020145 is a wasteful number, since it uses less digits than its factorization.

7701440020145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540288004034.

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 7701440020145 in words is "seven trillion, seven hundred one billion, four hundred forty million, twenty thousand, one hundred forty-five".