1620782337489 has 12 divisors (see below), whose sum is σ = 2513866482864. Its totient is φ = 926161335624.

The previous prime is 1620782337481. The next prime is 1620782337497. The reversal of 1620782337489 is 9847332870261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1620782337481) and next prime (1620782337497).

It is not a de Polignac number, because 1620782337489 - 2³ = 1620782337481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1620782337481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5512864947 + ... + 5512865240.

It is an arithmetic number, because the mean of its divisors is an integer number (209488873572).

Almost surely, 2^{1620782337489} is an apocalyptic number.

It is an amenable number.

1620782337489 is a deficient number, since it is larger than the sum of its proper divisors (893084145375).

1620782337489 is a wasteful number, since it uses less digits than its factorization.

1620782337489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025730204 (or 11025730197 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 1620782337489 in words is "one trillion, six hundred twenty billion, seven hundred eighty-two million, three hundred thirty-seven thousand, four hundred eighty-nine".