64191187137 has 32 divisors (see below), whose sum is σ = 106950666240. Its totient is φ = 33270059520.

The previous prime is 64191187121. The next prime is 64191187217. The reversal of 64191187137 is 73178119146.

64191187137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64191187137 - 2⁴ = 64191187121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64191187037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215088 + ... + 417905.

It is an arithmetic number, because the mean of its divisors is an integer number (3342208320).

Almost surely, 2^64191187137 is an apocalyptic number.

It is an amenable number.

64191187137 is a deficient number, since it is larger than the sum of its proper divisors (42759479103).

64191187137 is a wasteful number, since it uses less digits than its factorization.

64191187137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633453.

The product of its digits is 254016, while the sum is 48.

The spelling of 64191187137 in words is "sixty-four billion, one hundred ninety-one million, one hundred eighty-seven thousand, one hundred thirty-seven".