64561070371 has 8 divisors (see below), whose sum is σ = 73935591680. Its totient is φ = 55224426888.

The previous prime is 64561070333. The next prime is 64561070401. The reversal of 64561070371 is 17307016546.

64561070371 = 11270² + 11271² + ... + 11756².

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

It is a cyclic number.

It is not a de Polignac number, because 64561070371 - 2⁷ = 64561070243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64561070071) 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, 9465801 + ... + 9472618.

It is an arithmetic number, because the mean of its divisors is an integer number (9241948960).

Almost surely, 2^64561070371 is an apocalyptic number.

64561070371 is a deficient number, since it is larger than the sum of its proper divisors (9374521309).

64561070371 is a wasteful number, since it uses less digits than its factorization.

64561070371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18938913.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 64561070371 in words is "sixty-four billion, five hundred sixty-one million, seventy thousand, three hundred seventy-one".