1618432078 has 16 divisors (see below), whose sum is σ = 2493020160. Its totient is φ = 787714200.

The previous prime is 1618432069. The next prime is 1618432091. The reversal of 1618432078 is 8702348161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618432078.

It is a congruent 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, 60918 + ... + 83353.

It is an arithmetic number, because the mean of its divisors is an integer number (155813760).

Almost surely, 2^1618432078 is an apocalyptic number.

1618432078 is a deficient number, since it is larger than the sum of its proper divisors (874588082).

1618432078 is a wasteful number, since it uses less digits than its factorization.

1618432078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144423.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1618432078 is about 40229.7412121928. The cubic root of 1618432078 is about 1174.0812683716.

The spelling of 1618432078 in words is "one billion, six hundred eighteen million, four hundred thirty-two thousand, seventy-eight".