122779840250 has 48 divisors (see below), whose sum is σ = 235517857848. Its totient is φ = 47900240000.

The previous prime is 122779840241. The next prime is 122779840297. The reversal of 122779840250 is 52048977221.

It can be written as a sum of positive squares in 12 ways, for example, as 65571332761 + 57208507489 = 256069^2 + 239183^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122779840195 and 122779840204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35473520 + ... + 35476980.

Almost surely, 2^122779840250 is an apocalyptic number.

122779840250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122779840250 is a deficient number, since it is larger than the sum of its proper divisors (112738017598).

122779840250 is an frugal number, since it uses more digits than its factorization.

122779840250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 122779840250 in words is "one hundred twenty-two billion, seven hundred seventy-nine million, eight hundred forty thousand, two hundred fifty".