1255131625091 has 2 divisors, whose sum is σ = 1255131625092. Its totient is φ = 1255131625090.

The previous prime is 1255131625087. The next prime is 1255131625217. The reversal of 1255131625091 is 1905261315521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255131625091 - 2² = 1255131625087 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255131627091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627565812545 + 627565812546.

It is an arithmetic number, because the mean of its divisors is an integer number (627565812546).

Almost surely, 2^{1255131625091} is an apocalyptic number.

1255131625091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255131625091 is an equidigital number, since it uses as much as digits as its factorization.

1255131625091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 41.

The spelling of 1255131625091 in words is "one trillion, two hundred fifty-five billion, one hundred thirty-one million, six hundred twenty-five thousand, ninety-one".