155825378633 has 2 divisors, whose sum is σ = 155825378634. Its totient is φ = 155825378632.

The previous prime is 155825378581. The next prime is 155825378641. The reversal of 155825378633 is 336873528551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144561164944 + 11264213689 = 380212^2 + 106133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155825378633 is a prime.

It is a super-2 number, since 2×155825378633² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155825278633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77912689316 + 77912689317.

It is an arithmetic number, because the mean of its divisors is an integer number (77912689317).

Almost surely, 2^155825378633 is an apocalyptic number.

It is an amenable number.

155825378633 is a deficient number, since it is larger than the sum of its proper divisors (1).

155825378633 is an equidigital number, since it uses as much as digits as its factorization.

155825378633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 56.

The spelling of 155825378633 in words is "one hundred fifty-five billion, eight hundred twenty-five million, three hundred seventy-eight thousand, six hundred thirty-three".