125243511555 has 16 divisors (see below), whose sum is σ = 204653228544. Its totient is φ = 65375336160.

The previous prime is 125243511551. The next prime is 125243511583. The reversal of 125243511555 is 555115342521.

It is not a de Polignac number, because 125243511555 - 2² = 125243511551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125243511551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88824481 + ... + 88825890.

It is an arithmetic number, because the mean of its divisors is an integer number (12790826784).

Almost surely, 2^125243511555 is an apocalyptic number.

125243511555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125243511555 is a deficient number, since it is larger than the sum of its proper divisors (79409716989).

125243511555 is a wasteful number, since it uses less digits than its factorization.

125243511555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177650426.

The product of its digits is 150000, while the sum is 39.

The spelling of 125243511555 in words is "one hundred twenty-five billion, two hundred forty-three million, five hundred eleven thousand, five hundred fifty-five".