78255641782526 has 64 divisors (see below), whose sum is σ = 137658502900800. Its totient is φ = 33036246835200.

The previous prime is 78255641782471. The next prime is 78255641782531. The reversal of 78255641782526 is 62528714655287.

It is a super-2 number, since 2×78255641782526² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 976434416 + ... + 976514556.

It is an arithmetic number, because the mean of its divisors is an integer number (2150914107825).

Almost surely, 2^{78255641782526} is an apocalyptic number.

78255641782526 is a deficient number, since it is larger than the sum of its proper divisors (59402861118274).

78255641782526 is a wasteful number, since it uses less digits than its factorization.

78255641782526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148365.

The product of its digits is 451584000, while the sum is 68.

The spelling of 78255641782526 in words is "seventy-eight trillion, two hundred fifty-five billion, six hundred forty-one million, seven hundred eighty-two thousand, five hundred twenty-six".