1620161071 has 8 divisors (see below), whose sum is σ = 1624647024. Its totient is φ = 1615682880.

The previous prime is 1620161033. The next prime is 1620161083. The reversal of 1620161071 is 1701610261.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1620161071 - 2⁷ = 1620160943 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 (1620161171) 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, 755661 + ... + 757801.

It is an arithmetic number, because the mean of its divisors is an integer number (203080878).

Almost surely, 2^1620161071 is an apocalyptic number.

1620161071 is a deficient number, since it is larger than the sum of its proper divisors (4485953).

1620161071 is an equidigital number, since it uses as much as digits as its factorization.

1620161071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1620161071 is about 40251.2244658470. The cubic root of 1620161071 is about 1174.4992152364.

The spelling of 1620161071 in words is "one billion, six hundred twenty million, one hundred sixty-one thousand, seventy-one".