77454643 has 6 divisors (see below), whose sum is σ = 90100356. Its totient is φ = 66389652.

The previous prime is 77454631. The next prime is 77454673. The reversal of 77454643 is 34645477.

It is a de Polignac number, because none of the positive numbers 2^k-77454643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77454596 and 77454605.

It is not an unprimeable number, because it can be changed into a prime (77454623) 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, 790305 + ... + 790402.

It is an arithmetic number, because the mean of its divisors is an integer number (15016726).

Almost surely, 2^77454643 is an apocalyptic number.

77454643 is a deficient number, since it is larger than the sum of its proper divisors (12645713).

77454643 is a wasteful number, since it uses less digits than its factorization.

77454643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580721 (or 1580714 counting only the distinct ones).

The product of its digits is 282240, while the sum is 40.

The square root of 77454643 is about 8800.8319493102. The cubic root of 77454643 is about 426.2677587393.

The spelling of 77454643 in words is "seventy-seven million, four hundred fifty-four thousand, six hundred forty-three".