1641164472 has 24 divisors (see below), whose sum is σ = 4444820640. Its totient is φ = 547054800.

The previous prime is 1641164461. The next prime is 1641164477. The reversal of 1641164472 is 2744611461.

It is a happy number.

1641164472 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 1 + 644 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641164477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11396904 + ... + 11397047.

It is an arithmetic number, because the mean of its divisors is an integer number (185200860).

Almost surely, 2^1641164472 is an apocalyptic number.

1641164472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1641164472 is an abundant number, since it is smaller than the sum of its proper divisors (2803656168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641164472 is a wasteful number, since it uses less digits than its factorization.

1641164472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22793963 (or 22793956 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1641164472 is about 40511.2882046474. The cubic root of 1641164472 is about 1179.5527539947.

The spelling of 1641164472 in words is "one billion, six hundred forty-one million, one hundred sixty-four thousand, four hundred seventy-two".