125623278791 has 2 divisors, whose sum is σ = 125623278792. Its totient is φ = 125623278790.

The previous prime is 125623278763. The next prime is 125623278797. The reversal of 125623278791 is 197872326521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125623278791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125623278797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62811639395 + 62811639396.

It is an arithmetic number, because the mean of its divisors is an integer number (62811639396).

Almost surely, 2^125623278791 is an apocalyptic number.

125623278791 is a deficient number, since it is larger than the sum of its proper divisors (1).

125623278791 is an equidigital number, since it uses as much as digits as its factorization.

125623278791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 125623278791 in words is "one hundred twenty-five billion, six hundred twenty-three million, two hundred seventy-eight thousand, seven hundred ninety-one".