1612663920 has 120 divisors (see below), whose sum is σ = 6189577056. Its totient is φ = 368607744.

The previous prime is 1612663903. The next prime is 1612663963. The reversal of 1612663920 is 293662161.

It is a happy number.

1612663920 is a `hidden beast` number, since 1 + 6 + 1 + 266 + 392 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154947 + ... + 165026.

Almost surely, 2^1612663920 is an apocalyptic number.

1612663920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1612663920 is an abundant number, since it is smaller than the sum of its proper divisors (4576913136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1612663920 is a wasteful number, since it uses less digits than its factorization.

1612663920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319999 (or 319990 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1612663920 is about 40157.9870013426. The cubic root of 1612663920 is about 1172.6847834877.

The spelling of 1612663920 in words is "one billion, six hundred twelve million, six hundred sixty-three thousand, nine hundred twenty".