61819741512 has 64 divisors (see below), whose sum is σ = 171888681600. Its totient is φ = 20586519360.

The previous prime is 61819741499. The next prime is 61819741513. The reversal of 61819741512 is 21514791816.

61819741512 is a `hidden beast` number, since 6 + 1 + 8 + 1 + 97 + 41 + 512 = 666.

61819741512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61819741512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61819741513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83898 + ... + 361494.

It is an arithmetic number, because the mean of its divisors is an integer number (2685760650).

Almost surely, 2^61819741512 is an apocalyptic number.

It is an amenable number.

61819741512 is an abundant number, since it is smaller than the sum of its proper divisors (110068940088).

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

61819741512 is a wasteful number, since it uses less digits than its factorization.

61819741512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278643 (or 278633 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The spelling of 61819741512 in words is "sixty-one billion, eight hundred nineteen million, seven hundred forty-one thousand, five hundred twelve".