155278358897425 has 24 divisors (see below), whose sum is σ = 193182872114232. Its totient is φ = 123811877760000.

The previous prime is 155278358897423. The next prime is 155278358897461. The reversal of 155278358897425 is 524798853872551.

It can be written as a sum of positive squares in 12 ways, for example, as 45695315148561 + 109583043748864 = 6759831^2 + 10468192^2 .

It is not a de Polignac number, because 155278358897425 - 2¹ = 155278358897423 is a prime.

It is a super-2 number, since 2×155278358897425² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155278358897423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2426025 + ... + 17788825.

It is an arithmetic number, because the mean of its divisors is an integer number (8049286338093).

Almost surely, 2^{155278358897425} is an apocalyptic number.

It is an amenable number.

155278358897425 is a deficient number, since it is larger than the sum of its proper divisors (37904513216807).

155278358897425 is a wasteful number, since it uses less digits than its factorization.

155278358897425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15364149 (or 15364144 counting only the distinct ones).

The product of its digits is 6773760000, while the sum is 79.

The spelling of 155278358897425 in words is "one hundred fifty-five trillion, two hundred seventy-eight billion, three hundred fifty-eight million, eight hundred ninety-seven thousand, four hundred twenty-five".