64510042550 has 12 divisors (see below), whose sum is σ = 119988679236. Its totient is φ = 25804017000.

The previous prime is 64510042529. The next prime is 64510042561. The reversal of 64510042550 is 5524001546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 645100376 + ... + 645100475.

It is an arithmetic number, because the mean of its divisors is an integer number (9999056603).

Almost surely, 2^64510042550 is an apocalyptic number.

64510042550 is a deficient number, since it is larger than the sum of its proper divisors (55478636686).

64510042550 is a wasteful number, since it uses less digits than its factorization.

64510042550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290200863 (or 1290200858 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 64510042550 in words is "sixty-four billion, five hundred ten million, forty-two thousand, five hundred fifty".