581772437416 has 8 divisors (see below), whose sum is σ = 1090823320170. Its totient is φ = 290886218704.

The previous prime is 581772437413. The next prime is 581772437419. The reversal of 581772437416 is 614734277185.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (581772437413) and next prime (581772437419).

It can be written as a sum of positive squares in only one way, i.e., 564833414916 + 16939022500 = 751554^2 + 130150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (581772437413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36360777331 + ... + 36360777346.

Almost surely, 2^581772437416 is an apocalyptic number.

It is an amenable number.

581772437416 is a deficient number, since it is larger than the sum of its proper divisors (509050882754).

581772437416 is a wasteful number, since it uses less digits than its factorization.

581772437416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72721554683 (or 72721554679 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 55.

The spelling of 581772437416 in words is "five hundred eighty-one billion, seven hundred seventy-two million, four hundred thirty-seven thousand, four hundred sixteen".