61356736 has 56 divisors (see below), whose sum is σ = 140224256. Its totient is φ = 26092800.

The previous prime is 61356731. The next prime is 61356739. The reversal of 61356736 is 63765316.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 61356695 and 61356704.

It is not an unprimeable number, because it can be changed into a prime (61356731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67195 + ... + 68101.

Almost surely, 2^61356736 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 61356736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70112128).

61356736 is an abundant number, since it is smaller than the sum of its proper divisors (78867520).

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

61356736 is a wasteful number, since it uses less digits than its factorization.

61356736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1067 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 61356736 is about 7833.0540659439. The cubic root of 61356736 is about 394.4155989809.

The spelling of 61356736 in words is "sixty-one million, three hundred fifty-six thousand, seven hundred thirty-six".