86744433778 has 8 divisors (see below), whose sum is σ = 132249710700. Its totient is φ = 42661196880.

The previous prime is 86744433757. The next prime is 86744433779. The reversal of 86744433778 is 87733444768.

It can be written as a sum of positive squares in 2 ways, for example, as 86461285849 + 283147929 = 294043^2 + 16827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (86744433779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355509853 + ... + 355510096.

Almost surely, 2^86744433778 is an apocalyptic number.

86744433778 is a deficient number, since it is larger than the sum of its proper divisors (45505276922).

86744433778 is a wasteful number, since it uses less digits than its factorization.

86744433778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711020012.

The product of its digits is 75866112, while the sum is 61.

The spelling of 86744433778 in words is "eighty-six billion, seven hundred forty-four million, four hundred thirty-three thousand, seven hundred seventy-eight".