61420043512 has 32 divisors (see below), whose sum is σ = 125232451920. Its totient is φ = 28122370560.

The previous prime is 61420043497. The next prime is 61420043519. The reversal of 61420043512 is 21534002416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420043519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097914 + ... + 6107977.

Almost surely, 2^61420043512 is an apocalyptic number.

It is an amenable number.

61420043512 is an abundant number, since it is smaller than the sum of its proper divisors (63812408408).

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

61420043512 is a wasteful number, since it uses less digits than its factorization.

61420043512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12205951 (or 12205947 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 61420043512 its reverse (21534002416), we get a palindrome (82954045928).

The spelling of 61420043512 in words is "sixty-one billion, four hundred twenty million, forty-three thousand, five hundred twelve".