64020697552 has 240 divisors, whose sum is σ = 152683680000. Its totient is φ = 25985836800.

The previous prime is 64020697549. The next prime is 64020697577. The reversal of 64020697552 is 25579602046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321711949 + ... + 321712147.

It is an arithmetic number, because the mean of its divisors is an integer number (636182000).

Almost surely, 2^64020697552 is an apocalyptic number.

64020697552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64020697552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76341840000).

64020697552 is an abundant number, since it is smaller than the sum of its proper divisors (88662982448).

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

64020697552 is a wasteful number, since it uses less digits than its factorization.

64020697552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 64020697552 in words is "sixty-four billion, twenty million, six hundred ninety-seven thousand, five hundred fifty-two".