1011645856120 has 64 divisors (see below), whose sum is σ = 2381436288000. Its totient is φ = 386043090048.

The previous prime is 1011645856063. The next prime is 1011645856121. The reversal of 1011645856120 is 216585461101.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011645856121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1102000 + ... + 1799359.

It is an arithmetic number, because the mean of its divisors is an integer number (37209942000).

Almost surely, 2^{1011645856120} is an apocalyptic number.

1011645856120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011645856120 is an abundant number, since it is smaller than the sum of its proper divisors (1369790431880).

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

1011645856120 is a wasteful number, since it uses less digits than its factorization.

1011645856120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901772 (or 2901768 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 1011645856120 in words is "one trillion, eleven billion, six hundred forty-five million, eight hundred fifty-six thousand, one hundred twenty".