2456649397 has 2 divisors, whose sum is σ = 2456649398. Its totient is φ = 2456649396.

The previous prime is 2456649367. The next prime is 2456649407. The reversal of 2456649397 is 7939466542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416844881 + 1039804516 = 37641^2 + 32246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2456649397 - 2²⁷ = 2322431669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2456649317) by changing a digit.

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 as a sum of consecutive naturals, namely, 1228324698 + 1228324699.

It is an arithmetic number, because the mean of its divisors is an integer number (1228324699).

Almost surely, 2^2456649397 is an apocalyptic number.

It is an amenable number.

2456649397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2456649397 is an equidigital number, since it uses as much as digits as its factorization.

2456649397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 55.

The square root of 2456649397 is about 49564.5982229252. The cubic root of 2456649397 is about 1349.3182469005.

The spelling of 2456649397 in words is "two billion, four hundred fifty-six million, six hundred forty-nine thousand, three hundred ninety-seven".