78452781641 has 8 divisors (see below), whose sum is σ = 84888029184. Its totient is φ = 72074736720.

The previous prime is 78452781637. The next prime is 78452781689. The reversal of 78452781641 is 14618725487.

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

It is a cyclic number.

It is not a de Polignac number, because 78452781641 - 2² = 78452781637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78452781941) 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, 14297801 + ... + 14303286.

It is an arithmetic number, because the mean of its divisors is an integer number (10611003648).

Almost surely, 2^78452781641 is an apocalyptic number.

It is an amenable number.

78452781641 is a deficient number, since it is larger than the sum of its proper divisors (6435247543).

78452781641 is a wasteful number, since it uses less digits than its factorization.

78452781641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28601311.

The product of its digits is 3010560, while the sum is 53.

The spelling of 78452781641 in words is "seventy-eight billion, four hundred fifty-two million, seven hundred eighty-one thousand, six hundred forty-one".