155111430399 has 16 divisors (see below), whose sum is σ = 214570414080. Its totient is φ = 99563899680.

The previous prime is 155111430373. The next prime is 155111430401. The reversal of 155111430399 is 993034111551.

It is not a de Polignac number, because 155111430399 - 2¹² = 155111426303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155111430399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155111430349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4214839 + ... + 4251480.

It is an arithmetic number, because the mean of its divisors is an integer number (13410650880).

Almost surely, 2^155111430399 is an apocalyptic number.

155111430399 is a deficient number, since it is larger than the sum of its proper divisors (59458983681).

155111430399 is a wasteful number, since it uses less digits than its factorization.

155111430399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8466550.

The product of its (nonzero) digits is 72900, while the sum is 42.

The spelling of 155111430399 in words is "one hundred fifty-five billion, one hundred eleven million, four hundred thirty thousand, three hundred ninety-nine".