78041687623 has 2 divisors, whose sum is σ = 78041687624. Its totient is φ = 78041687622.

The previous prime is 78041687621. The next prime is 78041687639. The reversal of 78041687623 is 32678614087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78041687623 - 2¹ = 78041687621 is a prime.

It is a super-2 number, since 2×78041687623² (a number of 23 digits) contains 22 as substring.

Together with 78041687621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78041687621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39020843811 + 39020843812.

It is an arithmetic number, because the mean of its divisors is an integer number (39020843812).

Almost surely, 2^78041687623 is an apocalyptic number.

78041687623 is a deficient number, since it is larger than the sum of its proper divisors (1).

78041687623 is an equidigital number, since it uses as much as digits as its factorization.

78041687623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 78041687623 in words is "seventy-eight billion, forty-one million, six hundred eighty-seven thousand, six hundred twenty-three".