78865424001 has 36 divisors (see below), whose sum is σ = 142708872852. Its totient is φ = 41599341504.

The previous prime is 78865423993. The next prime is 78865424003. The reversal of 78865424001 is 10042456887.

It can be written as a sum of positive squares in 2 ways, for example, as 38594567025 + 40270856976 = 196455^2 + 200676^2 .

It is not a de Polignac number, because 78865424001 - 2³ = 78865423993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78865424003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6872466 + ... + 6883931.

It is an arithmetic number, because the mean of its divisors is an integer number (3964135357).

Almost surely, 2^78865424001 is an apocalyptic number.

It is an amenable number.

78865424001 is a deficient number, since it is larger than the sum of its proper divisors (63843448851).

78865424001 is a wasteful number, since it uses less digits than its factorization.

78865424001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13756430 (or 13756420 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 78865424001 in words is "seventy-eight billion, eight hundred sixty-five million, four hundred twenty-four thousand, one".