64438041950 has 24 divisors (see below), whose sum is σ = 120769692120. Its totient is φ = 25578456800.

The previous prime is 64438041949. The next prime is 64438041961. The reversal of 64438041950 is 5914083446.

It is a super-2 number, since 2×64438041950² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4912385 + ... + 4925484.

It is an arithmetic number, because the mean of its divisors is an integer number (5032070505).

Almost surely, 2^64438041950 is an apocalyptic number.

64438041950 is a deficient number, since it is larger than the sum of its proper divisors (56331650170).

64438041950 is a wasteful number, since it uses less digits than its factorization.

64438041950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9838012 (or 9838007 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 64438041950 in words is "sixty-four billion, four hundred thirty-eight million, forty-one thousand, nine hundred fifty".