78265502805 has 32 divisors (see below), whose sum is σ = 143400960000. Its totient is φ = 35706791232.

The previous prime is 78265502803. The next prime is 78265502831. The reversal of 78265502805 is 50820556287.

It is not a de Polignac number, because 78265502805 - 2¹ = 78265502803 is a prime.

It is a super-2 number, since 2×78265502805² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78265502803) 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 31 ways as a sum of consecutive naturals, for example, 694485 + ... + 799274.

It is an arithmetic number, because the mean of its divisors is an integer number (4481280000).

Almost surely, 2^78265502805 is an apocalyptic number.

It is an amenable number.

78265502805 is a deficient number, since it is larger than the sum of its proper divisors (65135457195).

78265502805 is a wasteful number, since it uses less digits than its factorization.

78265502805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494273.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 78265502805 in words is "seventy-eight billion, two hundred sixty-five million, five hundred two thousand, eight hundred five".