1620072461817 has 32 divisors (see below), whose sum is σ = 2405766908160. Its totient is φ = 1077504215040.

The previous prime is 1620072461797. The next prime is 1620072461837. The reversal of 1620072461817 is 7181642700261.

1620072461817 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 0 + 7 + 24 + 618 + 1 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1620072461797) and next prime (1620072461837).

It is not a de Polignac number, because 1620072461817 - 2¹¹ = 1620072459769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620072461837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22064388 + ... + 22137690.

It is an arithmetic number, because the mean of its divisors is an integer number (75180215880).

Almost surely, 2^{1620072461817} is an apocalyptic number.

It is an amenable number.

1620072461817 is a deficient number, since it is larger than the sum of its proper divisors (785694446343).

1620072461817 is a wasteful number, since it uses less digits than its factorization.

1620072461817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75230 (or 75224 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 1620072461817 in words is "one trillion, six hundred twenty billion, seventy-two million, four hundred sixty-one thousand, eight hundred seventeen".