85693414978 has 8 divisors (see below), whose sum is σ = 128644038972. Its totient is φ = 42812068656.

The previous prime is 85693414969. The next prime is 85693414987. The reversal of 85693414978 is 87941439658.

It is an interprime number because it is at equal distance from previous prime (85693414969) and next prime (85693414987).

It can be written as a sum of positive squares in 2 ways, for example, as 85361555889 + 331859089 = 292167^2 + 18217^2 .

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

It is a super-2 number, since 2×85693414978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17316325 + ... + 17321272.

Almost surely, 2^85693414978 is an apocalyptic number.

85693414978 is a deficient number, since it is larger than the sum of its proper divisors (42950623994).

85693414978 is a wasteful number, since it uses less digits than its factorization.

85693414978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34638836.

The product of its digits is 52254720, while the sum is 64.

The spelling of 85693414978 in words is "eighty-five billion, six hundred ninety-three million, four hundred fourteen thousand, nine hundred seventy-eight".