122455577890 has 16 divisors (see below), whose sum is σ = 224033484600. Its totient is φ = 48179243520.

The previous prime is 122455577873. The next prime is 122455577897. The reversal of 122455577890 is 98775554221.

It can be written as a sum of positive squares in 4 ways, for example, as 82116060481 + 40339517409 = 286559^2 + 200847^2 .

It is not an unprimeable number, because it can be changed into a prime (122455577897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100372815 + ... + 100374034.

Almost surely, 2^122455577890 is an apocalyptic number.

122455577890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122455577890 is a deficient number, since it is larger than the sum of its proper divisors (101577906710).

122455577890 is a wasteful number, since it uses less digits than its factorization.

122455577890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200746917.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 122455577890 in words is "one hundred twenty-two billion, four hundred fifty-five million, five hundred seventy-seven thousand, eight hundred ninety".