78263574671 has 16 divisors (see below), whose sum is σ = 85262499840. Its totient is φ = 71565132960.

The previous prime is 78263574667. The next prime is 78263574689. The reversal of 78263574671 is 17647536287.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78263574671 - 2² = 78263574667 is a prime.

It is a super-2 number, since 2×78263574671² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78263574601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52121 + ... + 399053.

It is an arithmetic number, because the mean of its divisors is an integer number (5328906240).

Almost surely, 2^78263574671 is an apocalyptic number.

78263574671 is a deficient number, since it is larger than the sum of its proper divisors (6998925169).

78263574671 is a wasteful number, since it uses less digits than its factorization.

78263574671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347366.

The product of its digits is 11854080, while the sum is 56.

The spelling of 78263574671 in words is "seventy-eight billion, two hundred sixty-three million, five hundred seventy-four thousand, six hundred seventy-one".