64371518213861 has 48 divisors (see below), whose sum is σ = 69501156278400. Its totient is φ = 59600003493888.

The previous prime is 64371518213839. The next prime is 64371518213881. The reversal of 64371518213861 is 16831281517346.

It is not a de Polignac number, because 64371518213861 - 2¹⁴ = 64371518197477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64371518213797 and 64371518213806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64371518213801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4493014280 + ... + 4493028606.

It is an arithmetic number, because the mean of its divisors is an integer number (1447940755800).

Almost surely, 2^{64371518213861} is an apocalyptic number.

It is an amenable number.

64371518213861 is a deficient number, since it is larger than the sum of its proper divisors (5129638064539).

64371518213861 is a wasteful number, since it uses less digits than its factorization.

64371518213861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15326 (or 15309 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The spelling of 64371518213861 in words is "sixty-four trillion, three hundred seventy-one billion, five hundred eighteen million, two hundred thirteen thousand, eight hundred sixty-one".