17780072058 has 24 divisors (see below), whose sum is σ = 44026845408. Its totient is φ = 5080020552.

The previous prime is 17780072039. The next prime is 17780072083. The reversal of 17780072058 is 85027008771.

It is a super-2 number, since 2×17780072058² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70555716 + ... + 70555967.

It is an arithmetic number, because the mean of its divisors is an integer number (1834451892).

Almost surely, 2^17780072058 is an apocalyptic number.

17780072058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

17780072058 is an abundant number, since it is smaller than the sum of its proper divisors (26246773350).

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

17780072058 is a wasteful number, since it uses less digits than its factorization.

17780072058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141111698 (or 141111695 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 45.

The spelling of 17780072058 in words is "seventeen billion, seven hundred eighty million, seventy-two thousand, fifty-eight".