155677138 has 8 divisors (see below), whose sum is σ = 233683632. Its totient is φ = 77782596.

The previous prime is 155677117. The next prime is 155677139. The reversal of 155677138 is 831776551.

155677138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 155677094 and 155677103.

It is not an unprimeable number, because it can be changed into a prime (155677139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24420 + ... + 30127.

It is an arithmetic number, because the mean of its divisors is an integer number (29210454).

Almost surely, 2^155677138 is an apocalyptic number.

155677138 is a deficient number, since it is larger than the sum of its proper divisors (78006494).

155677138 is a wasteful number, since it uses less digits than its factorization.

155677138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55976.

The product of its digits is 176400, while the sum is 43.

The square root of 155677138 is about 12477.0644784741. The cubic root of 155677138 is about 537.9496297558.

The spelling of 155677138 in words is "one hundred fifty-five million, six hundred seventy-seven thousand, one hundred thirty-eight".