77745225584 has 40 divisors (see below), whose sum is σ = 162249844512. Its totient is φ = 35875457280.

The previous prime is 77745225559. The next prime is 77745225589. The reversal of 77745225584 is 48552254777.

It is a happy number.

It is a super-2 number, since 2×77745225584² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77745225589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1129502 + ... + 1196354.

Almost surely, 2^77745225584 is an apocalyptic number.

It is an amenable number.

77745225584 is an abundant number, since it is smaller than the sum of its proper divisors (84504618928).

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

77745225584 is a wasteful number, since it uses less digits than its factorization.

77745225584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72465 (or 72459 counting only the distinct ones).

The product of its digits is 21952000, while the sum is 56.

The spelling of 77745225584 in words is "seventy-seven billion, seven hundred forty-five million, two hundred twenty-five thousand, five hundred eighty-four".