1226197859400 has 72 divisors (see below), whose sum is σ = 4117981150530. Its totient is φ = 326986095360.

The previous prime is 1226197859347. The next prime is 1226197859437. The reversal of 1226197859400 is 49587916221.

It is a happy number.

1226197859400 is a `hidden beast` number, since 1 + 226 + 1 + 9 + 7 + 8 + 5 + 9 + 400 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 847611152964 + 378586706436 = 920658^2 + 615294^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1226197859400² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 340608717 + ... + 340612316.

Almost surely, 2^{1226197859400} is an apocalyptic number.

1226197859400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226197859400 is an abundant number, since it is smaller than the sum of its proper divisors (2891783291130).

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

1226197859400 is a wasteful number, since it uses less digits than its factorization.

1226197859400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681221055 (or 681221043 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1226197859400 in words is "one trillion, two hundred twenty-six billion, one hundred ninety-seven million, eight hundred fifty-nine thousand, four hundred".