2620686463457 has 2 divisors, whose sum is σ = 2620686463458. Its totient is φ = 2620686463456.

The previous prime is 2620686463441. The next prime is 2620686463487. The reversal of 2620686463457 is 7543646860262.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1538651699776 + 1082034763681 = 1240424^2 + 1040209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2620686463457 - 2⁴ = 2620686463441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2620686463396 and 2620686463405.

It is not a weakly prime, because it can be changed into another prime (2620686463487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310343231728 + 1310343231729.

It is an arithmetic number, because the mean of its divisors is an integer number (1310343231729).

Almost surely, 2^{2620686463457} is an apocalyptic number.

It is an amenable number.

2620686463457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620686463457 is an equidigital number, since it uses as much as digits as its factorization.

2620686463457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 59.

The spelling of 2620686463457 in words is "two trillion, six hundred twenty billion, six hundred eighty-six million, four hundred sixty-three thousand, four hundred fifty-seven".