179779647820 has 12 divisors (see below), whose sum is σ = 377537260464. Its totient is φ = 71911859120.

The previous prime is 179779647791. The next prime is 179779647823. The reversal of 179779647820 is 28746977971.

It is not an unprimeable number, because it can be changed into a prime (179779647823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4494491176 + ... + 4494491215.

It is an arithmetic number, because the mean of its divisors is an integer number (31461438372).

Almost surely, 2^179779647820 is an apocalyptic number.

179779647820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

179779647820 is an abundant number, since it is smaller than the sum of its proper divisors (197757612644).

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

179779647820 is a wasteful number, since it uses less digits than its factorization.

179779647820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8988982400 (or 8988982398 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 67.

The spelling of 179779647820 in words is "one hundred seventy-nine billion, seven hundred seventy-nine million, six hundred forty-seven thousand, eight hundred twenty".