1016640616321 has 64 divisors (see below), whose sum is σ = 1267413811200. Its totient is φ = 804093998400.

The previous prime is 1016640616307. The next prime is 1016640616331. The reversal of 1016640616321 is 1236160466101.

It is not a de Polignac number, because 1016640616321 - 2¹⁹ = 1016640092033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016640616331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18898300 + ... + 18952018.

It is an arithmetic number, because the mean of its divisors is an integer number (19803340800).

Almost surely, 2^{1016640616321} is an apocalyptic number.

1016640616321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1016640616321 is a deficient number, since it is larger than the sum of its proper divisors (250773194879).

1016640616321 is a wasteful number, since it uses less digits than its factorization.

1016640616321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53930.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 1016640616321 in words is "one trillion, sixteen billion, six hundred forty million, six hundred sixteen thousand, three hundred twenty-one".