64143742460 has 48 divisors (see below), whose sum is σ = 154094356416. Its totient is φ = 21970801152.

The previous prime is 64143742451. The next prime is 64143742471. The reversal of 64143742460 is 6424734146.

It is a super-2 number, since 2×64143742460² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77147 + ... + 366386.

It is an arithmetic number, because the mean of its divisors is an integer number (3210299092).

Almost surely, 2^64143742460 is an apocalyptic number.

It is an amenable number.

64143742460 is an abundant number, since it is smaller than the sum of its proper divisors (89950613956).

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

64143742460 is a wasteful number, since it uses less digits than its factorization.

64143742460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444582 (or 444580 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 64143742460 in words is "sixty-four billion, one hundred forty-three million, seven hundred forty-two thousand, four hundred sixty".