125402281235855 has 64 divisors (see below), whose sum is σ = 173818523168640. Its totient is φ = 86069501945856.

The previous prime is 125402281235839. The next prime is 125402281235867. The reversal of 125402281235855 is 558532182204521.

It is a Cunningham number, because it is equal to 11198316²-1.

It is not a de Polignac number, because 125402281235855 - 2⁴ = 125402281235839 is a prime.

It is a super-2 number, since 2×125402281235855² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 125402281235797 and 125402281235806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1063781177 + ... + 1063899053.

It is an arithmetic number, because the mean of its divisors is an integer number (2715914424510).

Almost surely, 2^{125402281235855} is an apocalyptic number.

125402281235855 is a deficient number, since it is larger than the sum of its proper divisors (48416241932785).

125402281235855 is a wasteful number, since it uses less digits than its factorization.

125402281235855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134220.

The product of its (nonzero) digits is 7680000, while the sum is 53.

The spelling of 125402281235855 in words is "one hundred twenty-five trillion, four hundred two billion, two hundred eighty-one million, two hundred thirty-five thousand, eight hundred fifty-five".