1620946411 has 24 divisors (see below), whose sum is σ = 2010048000. Its totient is φ = 1299536784.

The previous prime is 1620946399. The next prime is 1620946417. The reversal of 1620946411 is 1146490261.

It is a happy number.

It is not a de Polignac number, because 1620946411 - 2¹¹ = 1620944363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620946417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62530 + ... + 84568.

It is an arithmetic number, because the mean of its divisors is an integer number (83752000).

Almost surely, 2^1620946411 is an apocalyptic number.

1620946411 is a deficient number, since it is larger than the sum of its proper divisors (389101589).

1620946411 is a wasteful number, since it uses less digits than its factorization.

1620946411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22151 (or 22144 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1620946411 is about 40260.9787635621. The cubic root of 1620946411 is about 1174.6889560869.

The spelling of 1620946411 in words is "one billion, six hundred twenty million, nine hundred forty-six thousand, four hundred eleven".