78228621156535 has 16 divisors (see below), whose sum is σ = 95826959857152. Its totient is φ = 61292828772000.

The previous prime is 78228621156503. The next prime is 78228621156551. The reversal of 78228621156535 is 53565112682287.

It is not a de Polignac number, because 78228621156535 - 2⁵ = 78228621156503 is a prime.

It is a super-2 number, since 2×78228621156535² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729622929 + ... + 729730138.

It is an arithmetic number, because the mean of its divisors is an integer number (5989184991072).

Almost surely, 2^{78228621156535} is an apocalyptic number.

78228621156535 is a deficient number, since it is larger than the sum of its proper divisors (17598338700617).

78228621156535 is a wasteful number, since it uses less digits than its factorization.

78228621156535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459353294.

The product of its digits is 48384000, while the sum is 61.

The spelling of 78228621156535 in words is "seventy-eight trillion, two hundred twenty-eight billion, six hundred twenty-one million, one hundred fifty-six thousand, five hundred thirty-five".