1223455578900 has 72 divisors (see below), whose sum is σ = 3539975968704. Its totient is φ = 326244576000.

The previous prime is 1223455578899. The next prime is 1223455578901. The reversal of 1223455578900 is 98755543221.

It is an interprime number because it is at equal distance from previous prime (1223455578899) and next prime (1223455578901).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223455578901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17770944 + ... + 17839656.

Almost surely, 2^{1223455578900} is an apocalyptic number.

1223455578900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223455578900 is an abundant number, since it is smaller than the sum of its proper divisors (2316520389804).

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

1223455578900 is a wasteful number, since it uses less digits than its factorization.

1223455578900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128081 (or 128074 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 51.

The spelling of 1223455578900 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-five million, five hundred seventy-eight thousand, nine hundred".