1256313263195 has 4 divisors (see below), whose sum is σ = 1507575915840. Its totient is φ = 1005050610552.

The previous prime is 1256313263159. The next prime is 1256313263197. The reversal of 1256313263195 is 5913623136521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1256313263195 - 2⁶ = 1256313263131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256313263197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125631326315 + ... + 125631326324.

It is an arithmetic number, because the mean of its divisors is an integer number (376893978960).

Almost surely, 2^{1256313263195} is an apocalyptic number.

1256313263195 is a deficient number, since it is larger than the sum of its proper divisors (251262652645).

1256313263195 is an equidigital number, since it uses as much as digits as its factorization.

1256313263195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251262652644.

The product of its digits is 874800, while the sum is 47.

The spelling of 1256313263195 in words is "one trillion, two hundred fifty-six billion, three hundred thirteen million, two hundred sixty-three thousand, one hundred ninety-five".