78385034641 has 8 divisors (see below), whose sum is σ = 85355755200. Its totient is φ = 71698833360.

The previous prime is 78385034639. The next prime is 78385034671. The reversal of 78385034641 is 14643058387.

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 78385034641 - 2¹ = 78385034639 is a prime.

It is a super-2 number, since 2×78385034641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78385034671) 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, 71129245 + ... + 71130346.

It is an arithmetic number, because the mean of its divisors is an integer number (10669469400).

Almost surely, 2^78385034641 is an apocalyptic number.

It is an amenable number.

78385034641 is a deficient number, since it is larger than the sum of its proper divisors (6970720559).

78385034641 is a wasteful number, since it uses less digits than its factorization.

78385034641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142259639.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 78385034641 in words is "seventy-eight billion, three hundred eighty-five million, thirty-four thousand, six hundred forty-one".