7561966890139 has 2 divisors, whose sum is σ = 7561966890140. Its totient is φ = 7561966890138.

The previous prime is 7561966890113. The next prime is 7561966890169. The reversal of 7561966890139 is 9310986691657.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7561966890139 - 2¹⁵ = 7561966857371 is a prime.

It is not a weakly prime, because it can be changed into another prime (7561966890169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3780983445069 + 3780983445070.

It is an arithmetic number, because the mean of its divisors is an integer number (3780983445070).

Almost surely, 2^{7561966890139} is an apocalyptic number.

7561966890139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7561966890139 is an equidigital number, since it uses as much as digits as its factorization.

7561966890139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132269760, while the sum is 70.

The spelling of 7561966890139 in words is "seven trillion, five hundred sixty-one billion, nine hundred sixty-six million, eight hundred ninety thousand, one hundred thirty-nine".