155805138628 has 24 divisors (see below), whose sum is σ = 273170651544. Its totient is φ = 77756448000.

The previous prime is 155805138617. The next prime is 155805138667. The reversal of 155805138628 is 826831508551.

155805138628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 436726404 + 155368412224 = 20898^2 + 394168^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 16533358 + ... + 16542778.

It is an arithmetic number, because the mean of its divisors is an integer number (11382110481).

Almost surely, 2^155805138628 is an apocalyptic number.

It is an amenable number.

155805138628 is a deficient number, since it is larger than the sum of its proper divisors (117365512916).

155805138628 is a wasteful number, since it uses less digits than its factorization.

155805138628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16743 (or 16741 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 52.

The spelling of 155805138628 in words is "one hundred fifty-five billion, eight hundred five million, one hundred thirty-eight thousand, six hundred twenty-eight".