78251551000678 has 16 divisors (see below), whose sum is σ = 128048201902080. Its totient is φ = 35568828664200.

The previous prime is 78251551000673. The next prime is 78251551000709. The reversal of 78251551000678 is 87600015515287.

It is a super-2 number, since 2×78251551000678² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78251551000673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12720583 + ... + 17841421.

It is an arithmetic number, because the mean of its divisors is an integer number (8003012618880).

Almost surely, 2^{78251551000678} is an apocalyptic number.

78251551000678 is a deficient number, since it is larger than the sum of its proper divisors (49796650901402).

78251551000678 is a wasteful number, since it uses less digits than its factorization.

78251551000678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815443.

The product of its (nonzero) digits is 4704000, while the sum is 55.

The spelling of 78251551000678 in words is "seventy-eight trillion, two hundred fifty-one billion, five hundred fifty-one million, six hundred seventy-eight", and thus it is an aban number.