78651253044 has 672 divisors, whose sum is σ = 266492776704. Its totient is φ = 19752284160.

The previous prime is 78651253013. The next prime is 78651253081. The reversal of 78651253044 is 44035215687.

78651253044 is a `hidden beast` number, since 7 + 8 + 65 + 12 + 530 + 44 = 666.

It is a super-3 number, since 3×78651253044³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 696028732 + ... + 696028844.

It is an arithmetic number, because the mean of its divisors is an integer number (396566632).

Almost surely, 2^78651253044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78651253044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133246388352).

78651253044 is an abundant number, since it is smaller than the sum of its proper divisors (187841523660).

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

78651253044 is a wasteful number, since it uses less digits than its factorization.

78651253044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 78651253044 in words is "seventy-eight billion, six hundred fifty-one million, two hundred fifty-three thousand, forty-four".