17978519070 has 24 divisors (see below), whose sum is σ = 46744149816. Its totient is φ = 4794271728.

The previous prime is 17978519023. The next prime is 17978519071. The reversal of 17978519070 is 7091587971.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 17978518998 and 17978519016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17978519071) 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, 99880572 + ... + 99880751.

It is an arithmetic number, because the mean of its divisors is an integer number (1947672909).

Almost surely, 2^17978519070 is an apocalyptic number.

17978519070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17978519070 is an abundant number, since it is smaller than the sum of its proper divisors (28765630746).

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

17978519070 is a wasteful number, since it uses less digits than its factorization.

17978519070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199761336 (or 199761333 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 54.

The spelling of 17978519070 in words is "seventeen billion, nine hundred seventy-eight million, five hundred nineteen thousand, seventy".