155401335403 has 4 divisors (see below), whose sum is σ = 156853684440. Its totient is φ = 153948986368.

The previous prime is 155401335371. The next prime is 155401335421. The reversal of 155401335403 is 304533104551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155401335403 - 2⁵ = 155401335371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155401335203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726174358 + ... + 726174571.

It is an arithmetic number, because the mean of its divisors is an integer number (39213421110).

Almost surely, 2^155401335403 is an apocalyptic number.

155401335403 is a deficient number, since it is larger than the sum of its proper divisors (1452349037).

155401335403 is a wasteful number, since it uses less digits than its factorization.

155401335403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452349036.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 155401335403 its reverse (304533104551), we get a palindrome (459934439954).

The spelling of 155401335403 in words is "one hundred fifty-five billion, four hundred one million, three hundred thirty-five thousand, four hundred three".