612128155 has 8 divisors (see below), whose sum is σ = 752469984. Its totient is φ = 477758400.

The previous prime is 612128137. The next prime is 612128161. The reversal of 612128155 is 551821216.

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

It is not a de Polignac number, because 612128155 - 2⁵ = 612128123 is a prime.

It is a Duffinian 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, 1492791 + ... + 1493200.

It is an arithmetic number, because the mean of its divisors is an integer number (94058748).

Almost surely, 2^612128155 is an apocalyptic number.

612128155 is a deficient number, since it is larger than the sum of its proper divisors (140341829).

612128155 is a wasteful number, since it uses less digits than its factorization.

612128155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986037.

The product of its digits is 4800, while the sum is 31.

The square root of 612128155 is about 24741.2237975408. The cubic root of 612128155 is about 849.0777332483.

The spelling of 612128155 in words is "six hundred twelve million, one hundred twenty-eight thousand, one hundred fifty-five".