61440019512 has 16 divisors (see below), whose sum is σ = 153600048840. Its totient is φ = 20480006496.

The previous prime is 61440019499. The next prime is 61440019513. The reversal of 61440019512 is 21591004416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61440019513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280000383 + ... + 1280000430.

Almost surely, 2^61440019512 is an apocalyptic number.

It is an amenable number.

61440019512 is an abundant number, since it is smaller than the sum of its proper divisors (92160029328).

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

61440019512 is a wasteful number, since it uses less digits than its factorization.

61440019512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560000822 (or 2560000818 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 61440019512 in words is "sixty-one billion, four hundred forty million, nineteen thousand, five hundred twelve".