155440312132025 has 6 divisors (see below), whose sum is σ = 192745987043742. Its totient is φ = 124352249705600.

The previous prime is 155440312131971. The next prime is 155440312132043. The reversal of 155440312132025 is 520231213044551.

155440312132025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 751716744256 + 154688595387769 = 867016^2 + 12437387^2 .

It is not a de Polignac number, because 155440312132025 - 2¹⁸ = 155440311869881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155440312132025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3108806242616 + ... + 3108806242665.

It is an arithmetic number, because the mean of its divisors is an integer number (32124331173957).

Almost surely, 2^{155440312132025} is an apocalyptic number.

It is an amenable number.

155440312132025 is a deficient number, since it is larger than the sum of its proper divisors (37305674911717).

155440312132025 is an equidigital number, since it uses as much as digits as its factorization.

155440312132025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217612485291 (or 6217612485286 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 155440312132025 its reverse (520231213044551), we get a palindrome (675671525176576).

The spelling of 155440312132025 in words is "one hundred fifty-five trillion, four hundred forty billion, three hundred twelve million, one hundred thirty-two thousand, twenty-five".