1616505370646 has 32 divisors (see below), whose sum is σ = 2669362525440. Its totient is φ = 730767701664.

The previous prime is 1616505370639. The next prime is 1616505370657. The reversal of 1616505370646 is 6460735056161.

It is a super-2 number, since 2×1616505370646² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616505370594 and 1616505370603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1700345 + ... + 2474708.

It is an arithmetic number, because the mean of its divisors is an integer number (83417578920).

Almost surely, 2^{1616505370646} is an apocalyptic number.

1616505370646 is a deficient number, since it is larger than the sum of its proper divisors (1052857154794).

1616505370646 is a wasteful number, since it uses less digits than its factorization.

1616505370646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175540.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 1616505370646 in words is "one trillion, six hundred sixteen billion, five hundred five million, three hundred seventy thousand, six hundred forty-six".