1021616466640 has 160 divisors (see below), whose sum is σ = 3030230624256. Its totient is φ = 311020577280.

The previous prime is 1021616466613. The next prime is 1021616466659. The reversal of 1021616466640 is 466646161201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1663572 + ... + 2193331.

Almost surely, 2^{1021616466640} is an apocalyptic number.

1021616466640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021616466640 is an abundant number, since it is smaller than the sum of its proper divisors (2008614157616).

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

1021616466640 is a wasteful number, since it uses less digits than its factorization.

1021616466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856977 (or 3856971 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 1021616466640 in words is "one trillion, twenty-one billion, six hundred sixteen million, four hundred sixty-six thousand, six hundred forty".