65073121636 has 24 divisors (see below), whose sum is σ = 117605298944. Its totient is φ = 31472569440.

The previous prime is 65073121609. The next prime is 65073121639. The reversal of 65073121636 is 63612137056.

It is a super-2 number, since 2×65073121636² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65073121639) 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, 154066 + ... + 392278.

Almost surely, 2^65073121636 is an apocalyptic number.

It is an amenable number.

65073121636 is a deficient number, since it is larger than the sum of its proper divisors (52532177308).

65073121636 is a wasteful number, since it uses less digits than its factorization.

65073121636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240451 (or 240449 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 65073121636 in words is "sixty-five billion, seventy-three million, one hundred twenty-one thousand, six hundred thirty-six".