61535163612 has 48 divisors (see below), whose sum is σ = 154657373472. Its totient is φ = 18930155520.

The previous prime is 61535163611. The next prime is 61535163629. The reversal of 61535163612 is 21636153516.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61535163611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812548 + ... + 885044.

It is an arithmetic number, because the mean of its divisors is an integer number (3222028614).

Almost surely, 2^61535163612 is an apocalyptic number.

It is an amenable number.

61535163612 is an abundant number, since it is smaller than the sum of its proper divisors (93122209860).

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

61535163612 is a wasteful number, since it uses less digits than its factorization.

61535163612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77958 (or 77956 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The spelling of 61535163612 in words is "sixty-one billion, five hundred thirty-five million, one hundred sixty-three thousand, six hundred twelve".