64541511156 has 12 divisors (see below), whose sum is σ = 150596859392. Its totient is φ = 21513837048.

The previous prime is 64541511149. The next prime is 64541511169. The reversal of 64541511156 is 65111514546.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2689229620 + ... + 2689229643.

Almost surely, 2^64541511156 is an apocalyptic number.

It is an amenable number.

64541511156 is an abundant number, since it is smaller than the sum of its proper divisors (86055348236).

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

64541511156 is a wasteful number, since it uses less digits than its factorization.

64541511156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378459270 (or 5378459268 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The spelling of 64541511156 in words is "sixty-four billion, five hundred forty-one million, five hundred eleven thousand, one hundred fifty-six".