1640016401553 has 24 divisors (see below), whose sum is σ = 2381214326400. Its totient is φ = 1087681085280.

The previous prime is 1640016401549. The next prime is 1640016401587. The reversal of 1640016401553 is 3551046100461.

1640016401553 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 0 + 1 + 640 + 1 + 5 + 5 + 3 = 666.

It is not a de Polignac number, because 1640016401553 - 2² = 1640016401549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640016401753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 748050 + ... + 1959492.

It is an arithmetic number, because the mean of its divisors is an integer number (99217263600).

Almost surely, 2^{1640016401553} is an apocalyptic number.

It is an amenable number.

1640016401553 is a deficient number, since it is larger than the sum of its proper divisors (741197924847).

1640016401553 is a wasteful number, since it uses less digits than its factorization.

1640016401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212229 (or 1212226 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 1640016401553 in words is "one trillion, six hundred forty billion, sixteen million, four hundred one thousand, five hundred fifty-three".