1620564177045 has 16 divisors (see below), whose sum is σ = 2828621109312. Its totient is φ = 785728085760.

The previous prime is 1620564177041. The next prime is 1620564177053. The reversal of 1620564177045 is 5407714650261.

It is not a de Polignac number, because 1620564177045 - 2² = 1620564177041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620564176985 and 1620564177003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620564177041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4910800372 + ... + 4910800701.

It is an arithmetic number, because the mean of its divisors is an integer number (176788819332).

Almost surely, 2^{1620564177045} is an apocalyptic number.

1620564177045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1620564177045 is a deficient number, since it is larger than the sum of its proper divisors (1208056932267).

1620564177045 is a wasteful number, since it uses less digits than its factorization.

1620564177045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821601092.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 1620564177045 in words is "one trillion, six hundred twenty billion, five hundred sixty-four million, one hundred seventy-seven thousand, forty-five".