1621069011 has 16 divisors (see below), whose sum is σ = 2407173120. Its totient is φ = 1078197480.

The previous prime is 1621069007. The next prime is 1621069061. The reversal of 1621069011 is 1109601261.

It is not a de Polignac number, because 1621069011 - 2² = 1621069007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1621069061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58015 + ... + 81288.

It is an arithmetic number, because the mean of its divisors is an integer number (150448320).

Almost surely, 2^1621069011 is an apocalyptic number.

1621069011 is a deficient number, since it is larger than the sum of its proper divisors (786104109).

1621069011 is a wasteful number, since it uses less digits than its factorization.

1621069011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139743 (or 139737 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1621069011 is about 40262.5013008382. The cubic root of 1621069011 is about 1174.7185711386.

The spelling of 1621069011 in words is "one billion, six hundred twenty-one million, sixty-nine thousand, eleven".