64131261652 has 48 divisors (see below), whose sum is σ = 124356435840. Its totient is φ = 28783834112.

The previous prime is 64131261647. The next prime is 64131261653. The reversal of 64131261652 is 25616213146.

It is a super-2 number, since 2×64131261652² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64131261653) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 483624 + ... + 601792.

It is an arithmetic number, because the mean of its divisors is an integer number (2590759080).

Almost surely, 2^64131261652 is an apocalyptic number.

It is an amenable number.

64131261652 is a deficient number, since it is larger than the sum of its proper divisors (60225174188).

64131261652 is a wasteful number, since it uses less digits than its factorization.

64131261652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118560 (or 118558 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

Adding to 64131261652 its reverse (25616213146), we get a palindrome (89747474798).

The spelling of 64131261652 in words is "sixty-four billion, one hundred thirty-one million, two hundred sixty-one thousand, six hundred fifty-two".