7840271890545 has 64 divisors (see below), whose sum is σ = 13141373091840. Its totient is φ = 3987795587328.

The previous prime is 7840271890531. The next prime is 7840271890621. The reversal of 7840271890545 is 5450981720487.

It is not a de Polignac number, because 7840271890545 - 2¹⁴ = 7840271874161 is a prime.

It is a super-2 number, since 2×7840271890545² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5180176 + ... + 6520334.

It is an arithmetic number, because the mean of its divisors is an integer number (205333954560).

Almost surely, 2^{7840271890545} is an apocalyptic number.

It is an amenable number.

7840271890545 is a deficient number, since it is larger than the sum of its proper divisors (5301101201295).

7840271890545 is a wasteful number, since it uses less digits than its factorization.

7840271890545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340414.

The product of its (nonzero) digits is 22579200, while the sum is 60.

The spelling of 7840271890545 in words is "seven trillion, eight hundred forty billion, two hundred seventy-one million, eight hundred ninety thousand, five hundred forty-five".