65381026767520 has 48 divisors (see below), whose sum is σ = 154463582122920. Its totient is φ = 26152257245184.

The previous prime is 65381026767517. The next prime is 65381026767521. The reversal of 65381026767520 is 2576762018356.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62605377470736 + 2775649296784 = 7912356^2 + 1666028^2 .

It is a super-2 number, since 2×65381026767520² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65381026767521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28434676 + ... + 30647884.

Almost surely, 2^{65381026767520} is an apocalyptic number.

It is an amenable number.

65381026767520 is an abundant number, since it is smaller than the sum of its proper divisors (89082555355400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65381026767520 is a wasteful number, since it uses less digits than its factorization.

65381026767520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397857 (or 2397849 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 65381026767520 in words is "sixty-five trillion, three hundred eighty-one billion, twenty-six million, seven hundred sixty-seven thousand, five hundred twenty".