61657936 has 10 divisors (see below), whose sum is σ = 119462282. Its totient is φ = 30828960.

The previous prime is 61657931. The next prime is 61657943. The reversal of 61657936 is 63975616.

61657936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 129600 = 7844^2 + 360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61657892 and 61657901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1926795 + ... + 1926826.

Almost surely, 2^61657936 is an apocalyptic number.

It is an amenable number.

61657936 is a deficient number, since it is larger than the sum of its proper divisors (57804346).

61657936 is a wasteful number, since it uses less digits than its factorization.

61657936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853629 (or 3853623 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 61657936 is about 7852.2567456751. The cubic root of 61657936 is about 395.0599406980.

It can be divided in two parts, 616 and 57936, that multiplied together give a triangular number (35688576 = T₈₄₄₈).

The spelling of 61657936 in words is "sixty-one million, six hundred fifty-seven thousand, nine hundred thirty-six".