1618936487 has 4 divisors (see below), whose sum is σ = 1850213136. Its totient is φ = 1387659840.

The previous prime is 1618936453. The next prime is 1618936519. The reversal of 1618936487 is 7846398161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1618936487 - 2¹² = 1618932391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618936427) 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, 115638314 + ... + 115638327.

It is an arithmetic number, because the mean of its divisors is an integer number (462553284).

Almost surely, 2^1618936487 is an apocalyptic number.

1618936487 is a deficient number, since it is larger than the sum of its proper divisors (231276649).

1618936487 is an equidigital number, since it uses as much as digits as its factorization.

1618936487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231276648.

The product of its digits is 1741824, while the sum is 53.

The square root of 1618936487 is about 40236.0098295047. The cubic root of 1618936487 is about 1174.2032291369.

The spelling of 1618936487 in words is "one billion, six hundred eighteen million, nine hundred thirty-six thousand, four hundred eighty-seven".