61912536 has 64 divisors (see below), whose sum is σ = 180679680. Its totient is φ = 17310720.

The previous prime is 61912531. The next prime is 61912597. The reversal of 61912536 is 63521916.

It is a happy number.

It is a super-2 number, since 2×61912536² = 7666324227902592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61912497 and 61912506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61912531) 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, 3976 + ... + 11816.

It is an arithmetic number, because the mean of its divisors is an integer number (2823120).

Almost surely, 2^61912536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61912536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90339840).

61912536 is an abundant number, since it is smaller than the sum of its proper divisors (118767144).

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

61912536 is a wasteful number, since it uses less digits than its factorization.

61912536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904 (or 7900 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 61912536 is about 7868.4519443153. The cubic root of 61912536 is about 395.6029588483.

The spelling of 61912536 in words is "sixty-one million, nine hundred twelve thousand, five hundred thirty-six".