1641072069 has 96 divisors (see below), whose sum is σ = 3091845120. Its totient is φ = 846666432.

The previous prime is 1641072031. The next prime is 1641072073. The reversal of 1641072069 is 9602701461.

1641072069 is a `hidden beast` number, since 1 + 641 + 0 + 7 + 2 + 0 + 6 + 9 = 666.

It is not a de Polignac number, because 1641072069 - 2⁸ = 1641071813 is a prime.

It is a super-2 number, since 2×1641072069² = 5386235071303881522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641072089) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1038522 + ... + 1040100.

It is an arithmetic number, because the mean of its divisors is an integer number (32206720).

Almost surely, 2^1641072069 is an apocalyptic number.

It is an amenable number.

1641072069 is a deficient number, since it is larger than the sum of its proper divisors (1450773051).

1641072069 is a wasteful number, since it uses less digits than its factorization.

1641072069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1641072069 is about 40510.1477286865. The cubic root of 1641072069 is about 1179.5306160026.

It can be divided in two parts, 164107 and 2069, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 1641072069 in words is "one billion, six hundred forty-one million, seventy-two thousand, sixty-nine".