1145123489900 has 36 divisors (see below), whose sum is σ = 2676065512512. Its totient is φ = 422814826560.

The previous prime is 1145123489869. The next prime is 1145123489903. The reversal of 1145123489900 is 99843215411.

It is a super-2 number, since 2×1145123489900² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145123489903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440430812 + ... + 440433411.

Almost surely, 2^{1145123489900} is an apocalyptic number.

1145123489900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145123489900 is an abundant number, since it is smaller than the sum of its proper divisors (1530942022612).

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

1145123489900 is a wasteful number, since it uses less digits than its factorization.

1145123489900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880864250 (or 880864243 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 1145123489900 in words is "one trillion, one hundred forty-five billion, one hundred twenty-three million, four hundred eighty-nine thousand, nine hundred".