64040087361 has 4 divisors (see below), whose sum is σ = 85386783152. Its totient is φ = 42693391572.

The previous prime is 64040087261. The next prime is 64040087369. The reversal of 64040087361 is 16378004046.

64040087361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 64040087361 - 2¹⁹ = 64039563073 is a prime.

It is a super-2 number, since 2×64040087361² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64040087369) 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, 10673347891 + ... + 10673347896.

It is an arithmetic number, because the mean of its divisors is an integer number (21346695788).

Almost surely, 2^64040087361 is an apocalyptic number.

It is an amenable number.

64040087361 is a deficient number, since it is larger than the sum of its proper divisors (21346695791).

64040087361 is a wasteful number, since it uses less digits than its factorization.

64040087361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21346695790.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 64040087361 in words is "sixty-four billion, forty million, eighty-seven thousand, three hundred sixty-one".