61464375520 has 24 divisors (see below), whose sum is σ = 145209587544. Its totient is φ = 24585750144.

The previous prime is 61464375503. The next prime is 61464375587. The reversal of 61464375520 is 2557346416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192076014 + ... + 192076333.

It is an arithmetic number, because the mean of its divisors is an integer number (6050399481).

Almost surely, 2^61464375520 is an apocalyptic number.

It is an amenable number.

61464375520 is an abundant number, since it is smaller than the sum of its proper divisors (83745212024).

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

61464375520 is a wasteful number, since it uses less digits than its factorization.

61464375520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384152362 (or 384152354 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 61464375520 in words is "sixty-one billion, four hundred sixty-four million, three hundred seventy-five thousand, five hundred twenty".