38209791465 has 48 divisors (see below), whose sum is σ = 67393684800. Its totient is φ = 20022178176.

The previous prime is 38209791437. The next prime is 38209791469. The reversal of 38209791465 is 56419790283.

38209791465 is a `hidden beast` number, since 3 + 8 + 2 + 0 + 97 + 91 + 465 = 666.

It is not a de Polignac number, because 38209791465 - 2⁶ = 38209791401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38209791469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1156546 + ... + 1189124.

It is an arithmetic number, because the mean of its divisors is an integer number (1404035100).

It is a 2-persistent number, because it is pandigital, and so is 2⋅38209791465 = 76419582930, but 3⋅38209791465 = 114629374395 is not.

Almost surely, 2^38209791465 is an apocalyptic number.

38209791465 is the 97737-th decagonal number.

It is an amenable number.

38209791465 is a deficient number, since it is larger than the sum of its proper divisors (29183893335).

38209791465 is a wasteful number, since it uses less digits than its factorization.

38209791465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33046 (or 33043 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 38209791465 in words is "thirty-eight billion, two hundred nine million, seven hundred ninety-one thousand, four hundred sixty-five".