64413671890 has 32 divisors (see below), whose sum is σ = 121514100480. Its totient is φ = 24537589824.

The previous prime is 64413671849. The next prime is 64413671893. The reversal of 64413671890 is 9817631446.

It is a super-2 number, since 2×64413671890² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64413671893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558814 + ... + 664153.

It is an arithmetic number, because the mean of its divisors is an integer number (3797315640).

Almost surely, 2^64413671890 is an apocalyptic number.

64413671890 is a deficient number, since it is larger than the sum of its proper divisors (57100428590).

64413671890 is a wasteful number, since it uses less digits than its factorization.

64413671890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223226.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 64413671890 in words is "sixty-four billion, four hundred thirteen million, six hundred seventy-one thousand, eight hundred ninety".