78528460826 has 4 divisors (see below), whose sum is σ = 117792691242. Its totient is φ = 39264230412.

The previous prime is 78528460781. The next prime is 78528460841. The reversal of 78528460826 is 62806482587.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63189390625 + 15339070201 = 251375^2 + 123851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19632115205 + ... + 19632115208.

Almost surely, 2^78528460826 is an apocalyptic number.

78528460826 is a deficient number, since it is larger than the sum of its proper divisors (39264230416).

78528460826 is a wasteful number, since it uses less digits than its factorization.

78528460826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39264230415.

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 78528460826 in words is "seventy-eight billion, five hundred twenty-eight million, four hundred sixty thousand, eight hundred twenty-six".