1620775682 has 8 divisors (see below), whose sum is σ = 2574173196. Its totient is φ = 762717952.

The previous prime is 1620775649. The next prime is 1620775703. The reversal of 1620775682 is 2865770261.

It can be written as a sum of positive squares in 2 ways, for example, as 1619338081 + 1437601 = 40241^2 + 1199^2 .

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

It is a super-2 number, since 2×1620775682² = 5253827622725130248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23834903 + ... + 23834970.

Almost surely, 2^1620775682 is an apocalyptic number.

1620775682 is a deficient number, since it is larger than the sum of its proper divisors (953397514).

1620775682 is a wasteful number, since it uses less digits than its factorization.

1620775682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47669892.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 1620775682 is about 40258.8584289222. The cubic root of 1620775682 is about 1174.6477125863.

The spelling of 1620775682 in words is "one billion, six hundred twenty million, seven hundred seventy-five thousand, six hundred eighty-two".