1985364155 has 8 divisors (see below), whose sum is σ = 2459289984. Its totient is φ = 1537056000.

The previous prime is 1985364151. The next prime is 1985364179. The reversal of 1985364155 is 5514635891.

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

It is not a de Polignac number, because 1985364155 - 2² = 1985364151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985364151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6404246 + ... + 6404555.

It is an arithmetic number, because the mean of its divisors is an integer number (307411248).

Almost surely, 2^1985364155 is an apocalyptic number.

1985364155 is a deficient number, since it is larger than the sum of its proper divisors (473925829).

1985364155 is a wasteful number, since it uses less digits than its factorization.

1985364155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12808837.

The product of its digits is 648000, while the sum is 47.

The square root of 1985364155 is about 44557.4253632321. The cubic root of 1985364155 is about 1256.8401875918.

The spelling of 1985364155 in words is "one billion, nine hundred eighty-five million, three hundred sixty-four thousand, one hundred fifty-five".