64885137830 has 16 divisors (see below), whose sum is σ = 116886780000. Its totient is φ = 25933270272.

The previous prime is 64885137829. The next prime is 64885137847. The reversal of 64885137830 is 3873158846.

It is a super-2 number, since 2×64885137830² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2584994 + ... + 2609973.

It is an arithmetic number, because the mean of its divisors is an integer number (7305423750).

Almost surely, 2^64885137830 is an apocalyptic number.

64885137830 is a deficient number, since it is larger than the sum of its proper divisors (52001642170).

64885137830 is a wasteful number, since it uses less digits than its factorization.

64885137830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196223.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 64885137830 in words is "sixty-four billion, eight hundred eighty-five million, one hundred thirty-seven thousand, eight hundred thirty".