78190074890 has 32 divisors (see below), whose sum is σ = 149360682240. Its totient is φ = 29369182464.

The previous prime is 78190074889. The next prime is 78190074901. The reversal of 78190074890 is 9847009187.

It is a super-2 number, since 2×78190074890² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449222 + ... + 598481.

It is an arithmetic number, because the mean of its divisors is an integer number (4667521320).

Almost surely, 2^78190074890 is an apocalyptic number.

78190074890 is a deficient number, since it is larger than the sum of its proper divisors (71170607350).

78190074890 is a wasteful number, since it uses less digits than its factorization.

78190074890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048166.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 78190074890 in words is "seventy-eight billion, one hundred ninety million, seventy-four thousand, eight hundred ninety".