64155535505534 has 16 divisors (see below), whose sum is σ = 106310668734720. Its totient is φ = 28792472780760.

The previous prime is 64155535505533. The next prime is 64155535505543. The reversal of 64155535505534 is 43550553555146.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64155535505534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64155535505533) 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, 18456711584 + ... + 18456715059.

It is an arithmetic number, because the mean of its divisors is an integer number (6644416795920).

Almost surely, 2^{64155535505534} is an apocalyptic number.

64155535505534 is a deficient number, since it is larger than the sum of its proper divisors (42155133229186).

64155535505534 is a wasteful number, since it uses less digits than its factorization.

64155535505534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36913426735.

The product of its (nonzero) digits is 67500000, while the sum is 56.

The spelling of 64155535505534 in words is "sixty-four trillion, one hundred fifty-five billion, five hundred thirty-five million, five hundred five thousand, five hundred thirty-four".