64123156870 has 32 divisors (see below), whose sum is σ = 117062651520. Its totient is φ = 25285603200.

The previous prime is 64123156789. The next prime is 64123156871. The reversal of 64123156870 is 7865132146.

It is a super-2 number, since 2×64123156870² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64123156871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453720 + ... + 578020.

It is an arithmetic number, because the mean of its divisors is an integer number (3658207860).

Almost surely, 2^64123156870 is an apocalyptic number.

64123156870 is a deficient number, since it is larger than the sum of its proper divisors (52939494650).

64123156870 is a wasteful number, since it uses less digits than its factorization.

64123156870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125040.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 64123156870 in words is "sixty-four billion, one hundred twenty-three million, one hundred fifty-six thousand, eight hundred seventy".