78216344476025 has 24 divisors (see below), whose sum is σ = 111275032525440. Its totient is φ = 53425371893760.

The previous prime is 78216344476003. The next prime is 78216344476027. The reversal of 78216344476025 is 52067444361287.

It is not a de Polignac number, because 78216344476025 - 2¹² = 78216344471929 is a prime.

It is a super-2 number, since 2×78216344476025² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78216344476027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 869508605 + ... + 869598554.

It is an arithmetic number, because the mean of its divisors is an integer number (4636459688560).

Almost surely, 2^{78216344476025} is an apocalyptic number.

It is an amenable number.

78216344476025 is a deficient number, since it is larger than the sum of its proper divisors (33058688049415).

78216344476025 is a wasteful number, since it uses less digits than its factorization.

78216344476025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739107433 (or 1739107428 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 59.

The spelling of 78216344476025 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred forty-four million, four hundred seventy-six thousand, twenty-five".