1612905478 has 16 divisors (see below), whose sum is σ = 2608809840. Its totient is φ = 745372800.

The previous prime is 1612905473. The next prime is 1612905491. The reversal of 1612905478 is 8745092161.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612905473) 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, 516063 + ... + 519178.

It is an arithmetic number, because the mean of its divisors is an integer number (163050615).

Almost surely, 2^1612905478 is an apocalyptic number.

1612905478 is a deficient number, since it is larger than the sum of its proper divisors (995904362).

1612905478 is a wasteful number, since it uses less digits than its factorization.

1612905478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035303.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1612905478 is about 40160.9944846987. The cubic root of 1612905478 is about 1172.7433320059.

The spelling of 1612905478 in words is "one billion, six hundred twelve million, nine hundred five thousand, four hundred seventy-eight".