64927741040 has 160 divisors (see below), whose sum is σ = 156526231680. Its totient is φ = 25030656000.

The previous prime is 64927741019. The next prime is 64927741061. The reversal of 64927741040 is 4014772946.

It is an interprime number because it is at equal distance from previous prime (64927741019) and next prime (64927741061).

It is a super-2 number, since 2×64927741040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64927740982 and 64927741000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166909166 + ... + 166909554.

It is an arithmetic number, because the mean of its divisors is an integer number (978288948).

Almost surely, 2^64927741040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64927741040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78263115840).

64927741040 is an abundant number, since it is smaller than the sum of its proper divisors (91598490640).

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

64927741040 is a wasteful number, since it uses less digits than its factorization.

64927741040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 64927741040 in words is "sixty-four billion, nine hundred twenty-seven million, seven hundred forty-one thousand, forty".