78045628851 has 12 divisors (see below), whose sum is σ = 113555442312. Its totient is φ = 51650634336.

The previous prime is 78045628847. The next prime is 78045628889. The reversal of 78045628851 is 15882654087.

78045628851 is a `hidden beast` number, since 7 + 8 + 0 + 4 + 5 + 628 + 8 + 5 + 1 = 666.

It is not a de Polignac number, because 78045628851 - 2² = 78045628847 is a prime.

It is a super-2 number, since 2×78045628851² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78045628751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31647441 + ... + 31649906.

It is an arithmetic number, because the mean of its divisors is an integer number (9462953526).

Almost surely, 2^78045628851 is an apocalyptic number.

78045628851 is a deficient number, since it is larger than the sum of its proper divisors (35509813461).

78045628851 is a wasteful number, since it uses less digits than its factorization.

78045628851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63297490 (or 63297487 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 78045628851 in words is "seventy-eight billion, forty-five million, six hundred twenty-eight thousand, eight hundred fifty-one".