64387142737 has 4 divisors (see below), whose sum is σ = 64435664896. Its totient is φ = 64338620580.

The previous prime is 64387142713. The next prime is 64387142741. The reversal of 64387142737 is 73724178346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64387142737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64387142837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24259089 + ... + 24261742.

It is an arithmetic number, because the mean of its divisors is an integer number (16108916224).

Almost surely, 2^64387142737 is an apocalyptic number.

It is an amenable number.

64387142737 is a deficient number, since it is larger than the sum of its proper divisors (48522159).

64387142737 is a wasteful number, since it uses less digits than its factorization.

64387142737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48522158.

The product of its digits is 4741632, while the sum is 52.

The spelling of 64387142737 in words is "sixty-four billion, three hundred eighty-seven million, one hundred forty-two thousand, seven hundred thirty-seven".