1616640241640 has 32 divisors (see below), whose sum is σ = 3637583889480. Its totient is φ = 646630612992.

The previous prime is 1616640241639. The next prime is 1616640241661. The reversal of 1616640241640 is 461420466161.

It can be written as a sum of positive squares in 4 ways, for example, as 1414001617924 + 202638623716 = 1189118^2 + 450154^2 .

It is a super-2 number, since 2×1616640241640² (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 7 ways as a sum of consecutive naturals, for example, 248252 + ... + 1815188.

Almost surely, 2^{1616640241640} is an apocalyptic number.

1616640241640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616640241640 is an abundant number, since it is smaller than the sum of its proper divisors (2020943647840).

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

1616640241640 is a wasteful number, since it uses less digits than its factorization.

1616640241640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592741 (or 1592737 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 1616640241640 in words is "one trillion, six hundred sixteen billion, six hundred forty million, two hundred forty-one thousand, six hundred forty".