64611632514 has 192 divisors, whose sum is σ = 156050496000. Its totient is φ = 17712414720.

The previous prime is 64611632513. The next prime is 64611632521. The reversal of 64611632514 is 41523611646.

It is a super-2 number, since 2×64611632514² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (64611632513) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 143900962 + ... + 143901410.

It is an arithmetic number, because the mean of its divisors is an integer number (812763000).

Almost surely, 2^64611632514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64611632514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78025248000).

64611632514 is an abundant number, since it is smaller than the sum of its proper divisors (91438863486).

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

64611632514 is a wasteful number, since it uses less digits than its factorization.

64611632514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 750 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The spelling of 64611632514 in words is "sixty-four billion, six hundred eleven million, six hundred thirty-two thousand, five hundred fourteen".