6156139087261 has 2 divisors, whose sum is σ = 6156139087262. Its totient is φ = 6156139087260.

The previous prime is 6156139087211. The next prime is 6156139087283. The reversal of 6156139087261 is 1627809316516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5947408890361 + 208730196900 = 2438731^2 + 456870^2 .

It is a cyclic number.

It is not a de Polignac number, because 6156139087261 - 2¹⁵ = 6156139054493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6156139087211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078069543630 + 3078069543631.

It is an arithmetic number, because the mean of its divisors is an integer number (3078069543631).

Almost surely, 2^{6156139087261} is an apocalyptic number.

It is an amenable number.

6156139087261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6156139087261 is an equidigital number, since it uses as much as digits as its factorization.

6156139087261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 6156139087261 in words is "six trillion, one hundred fifty-six billion, one hundred thirty-nine million, eighty-seven thousand, two hundred sixty-one".