78111552029476 has 27 divisors (see below), whose sum is σ = 159013054231227. Its totient is φ = 33476326412760.

The previous prime is 78111552029473. The next prime is 78111552029557. The reversal of 78111552029476 is 67492025511187.

It is a happy number.

The square root of 78111552029476 is 8838074.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×78111552029476² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78111552029476.

It is not an unprimeable number, because it can be changed into a prime (78111552029473) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123417391 + ... + 124048681.

Almost surely, 2^{78111552029476} is an apocalyptic number.

78111552029476 is the 8838074-th square number.

It is an amenable number.

78111552029476 is an abundant number, since it is smaller than the sum of its proper divisors (80901502201751).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78111552029476 is an frugal number, since it uses more digits than its factorization.

78111552029476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262600 (or 631300 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 78111552029476 in words is "seventy-eight trillion, one hundred eleven billion, five hundred fifty-two million, twenty-nine thousand, four hundred seventy-six".