1056220861650 has 48 divisors (see below), whose sum is σ = 2650987138464. Its totient is φ = 278265412480.

The previous prime is 1056220861627. The next prime is 1056220861697. The reversal of 1056220861650 is 561680226501.

It is a super-2 number, since 2×1056220861650² (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 23 ways as a sum of consecutive naturals, for example, 42406059 + ... + 42430958.

It is an arithmetic number, because the mean of its divisors is an integer number (55228898718).

Almost surely, 2^{1056220861650} is an apocalyptic number.

1056220861650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1056220861650 is an abundant number, since it is smaller than the sum of its proper divisors (1594766276814).

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

1056220861650 is a wasteful number, since it uses less digits than its factorization.

1056220861650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84837115 (or 84837110 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1056220861650 in words is "one trillion, fifty-six billion, two hundred twenty million, eight hundred sixty-one thousand, six hundred fifty".