64534331523402 has 96 divisors (see below), whose sum is σ = 151145760519936. Its totient is φ = 19782135446400.

The previous prime is 64534331523349. The next prime is 64534331523461. The reversal of 64534331523402 is 20432513343546.

64534331523402 is a `hidden beast` number, since 6 + 4 + 53 + 4 + 3 + 31 + 523 + 40 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1449177877 + ... + 1449222407.

It is an arithmetic number, because the mean of its divisors is an integer number (1574435005416).

Almost surely, 2^{64534331523402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64534331523402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75572880259968).

64534331523402 is an abundant number, since it is smaller than the sum of its proper divisors (86611428996534).

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

64534331523402 is a wasteful number, since it uses less digits than its factorization.

64534331523402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67676 (or 67673 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 45.

Adding to 64534331523402 its reverse (20432513343546), we get a palindrome (84966844866948).

The spelling of 64534331523402 in words is "sixty-four trillion, five hundred thirty-four billion, three hundred thirty-one million, five hundred twenty-three thousand, four hundred two".