155235403469 has 2 divisors, whose sum is σ = 155235403470. Its totient is φ = 155235403468.

The previous prime is 155235403439. The next prime is 155235403523. The reversal of 155235403469 is 964304532551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135084181444 + 20151222025 = 367538^2 + 141955^2 .

It is a cyclic number.

It is not a de Polignac number, because 155235403469 - 2³⁶ = 86515926733 is a prime.

It is a super-2 number, since 2×155235403469² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155235403409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617701734 + 77617701735.

It is an arithmetic number, because the mean of its divisors is an integer number (77617701735).

Almost surely, 2^155235403469 is an apocalyptic number.

It is an amenable number.

155235403469 is a deficient number, since it is larger than the sum of its proper divisors (1).

155235403469 is an equidigital number, since it uses as much as digits as its factorization.

155235403469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 155235403469 in words is "one hundred fifty-five billion, two hundred thirty-five million, four hundred three thousand, four hundred sixty-nine".