77256725251 has 2 divisors, whose sum is σ = 77256725252. Its totient is φ = 77256725250.

The previous prime is 77256725213. The next prime is 77256725263. The reversal of 77256725251 is 15252765277.

It is a strong prime.

It is an emirp because it is prime and its reverse (15252765277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77256725251 - 2¹³ = 77256717059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77256725195 and 77256725204.

It is not a weakly prime, because it can be changed into another prime (77256725851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38628362625 + 38628362626.

It is an arithmetic number, because the mean of its divisors is an integer number (38628362626).

Almost surely, 2^77256725251 is an apocalyptic number.

77256725251 is a deficient number, since it is larger than the sum of its proper divisors (1).

77256725251 is an equidigital number, since it uses as much as digits as its factorization.

77256725251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2058000, while the sum is 49.

The spelling of 77256725251 in words is "seventy-seven billion, two hundred fifty-six million, seven hundred twenty-five thousand, two hundred fifty-one".