6261655397 has 2 divisors, whose sum is σ = 6261655398. Its totient is φ = 6261655396.

The previous prime is 6261655391. The next prime is 6261655403. The reversal of 6261655397 is 7935561626.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6261655391) and next prime (6261655403).

It can be written as a sum of positive squares in only one way, i.e., 6260132641 + 1522756 = 79121^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 6261655397 - 2¹⁶ = 6261589861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6261655391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130827698 + 3130827699.

It is an arithmetic number, because the mean of its divisors is an integer number (3130827699).

Almost surely, 2^6261655397 is an apocalyptic number.

It is an amenable number.

6261655397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6261655397 is an equidigital number, since it uses as much as digits as its factorization.

6261655397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 50.

The square root of 6261655397 is about 79130.6223721260. The cubic root of 6261655397 is about 1843.1600742695.

The spelling of 6261655397 in words is "six billion, two hundred sixty-one million, six hundred fifty-five thousand, three hundred ninety-seven".