7874286487657 has 2 divisors, whose sum is σ = 7874286487658. Its totient is φ = 7874286487656.

The previous prime is 7874286487621. The next prime is 7874286487663. The reversal of 7874286487657 is 7567846824787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4948507026576 + 2925779461081 = 2224524^2 + 1710491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7874286487657 is a prime.

It is a super-2 number, since 2×7874286487657² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7874286488657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3937143243828 + 3937143243829.

It is an arithmetic number, because the mean of its divisors is an integer number (3937143243829).

Almost surely, 2^{7874286487657} is an apocalyptic number.

It is an amenable number.

7874286487657 is a deficient number, since it is larger than the sum of its proper divisors (1).

7874286487657 is an equidigital number, since it uses as much as digits as its factorization.

7874286487657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7080837120, while the sum is 79.

The spelling of 7874286487657 in words is "seven trillion, eight hundred seventy-four billion, two hundred eighty-six million, four hundred eighty-seven thousand, six hundred fifty-seven".