155235324779 has 2 divisors, whose sum is σ = 155235324780. Its totient is φ = 155235324778.

The previous prime is 155235324767. The next prime is 155235324787. The reversal of 155235324779 is 977423532551.

155235324779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155235324779 - 2²⁸ = 154966889323 is a prime.

It is a super-2 number, since 2×155235324779² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155235324779.

It is not a weakly prime, because it can be changed into another prime (155235324709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617662389 + 77617662390.

It is an arithmetic number, because the mean of its divisors is an integer number (77617662390).

Almost surely, 2^155235324779 is an apocalyptic number.

155235324779 is a deficient number, since it is larger than the sum of its proper divisors (1).

155235324779 is an equidigital number, since it uses as much as digits as its factorization.

155235324779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938000, while the sum is 53.

The spelling of 155235324779 in words is "one hundred fifty-five billion, two hundred thirty-five million, three hundred twenty-four thousand, seven hundred seventy-nine".