155518349428 has 24 divisors (see below), whose sum is σ = 293492198888. Its totient is φ = 71679758976.

The previous prime is 155518349351. The next prime is 155518349461. The reversal of 155518349428 is 824943815551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37167212944 + 118351136484 = 192788^2 + 344022^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001951 + ... + 2078182.

Almost surely, 2^155518349428 is an apocalyptic number.

It is an amenable number.

155518349428 is a deficient number, since it is larger than the sum of its proper divisors (137973849460).

155518349428 is a wasteful number, since it uses less digits than its factorization.

155518349428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080883 (or 4080881 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 55.

The spelling of 155518349428 in words is "one hundred fifty-five billion, five hundred eighteen million, three hundred forty-nine thousand, four hundred twenty-eight".