64577754249918 has 128 divisors (see below), whose sum is σ = 159890901660672. Its totient is φ = 16932101400576.

The previous prime is 64577754249859. The next prime is 64577754249949. The reversal of 64577754249918 is 81994245777546.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66423696 + ... + 67388892.

It is an arithmetic number, because the mean of its divisors is an integer number (1249147669224).

Almost surely, 2^{64577754249918} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64577754249918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79945450830336).

64577754249918 is an abundant number, since it is smaller than the sum of its proper divisors (95313147410754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64577754249918 is a wasteful number, since it uses less digits than its factorization.

64577754249918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965938.

The product of its digits is 4267468800, while the sum is 78.

The spelling of 64577754249918 in words is "sixty-four trillion, five hundred seventy-seven billion, seven hundred fifty-four million, two hundred forty-nine thousand, nine hundred eighteen".