64761840037 has 8 divisors (see below), whose sum is σ = 67170700152. Its totient is φ = 62387640000.

The previous prime is 64761840007. The next prime is 64761840053. The reversal of 64761840037 is 73004816746.

It can be written as a sum of positive squares in 4 ways, for example, as 32838513796 + 31923326241 = 181214^2 + 178671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64761840037 is a prime.

It is a super-2 number, since 2×64761840037² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64761840007) 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, 8661214 + ... + 8668687.

It is an arithmetic number, because the mean of its divisors is an integer number (8396337519).

Almost surely, 2^64761840037 is an apocalyptic number.

It is an amenable number.

64761840037 is a deficient number, since it is larger than the sum of its proper divisors (2408860115).

64761840037 is a wasteful number, since it uses less digits than its factorization.

64761840037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17330039.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 64761840037 in words is "sixty-four billion, seven hundred sixty-one million, eight hundred forty thousand, thirty-seven".