61643037 has 16 divisors (see below), whose sum is σ = 89052480. Its totient is φ = 37777152.

The previous prime is 61643033. The next prime is 61643051. The reversal of 61643037 is 73034616.

It is not a de Polignac number, because 61643037 - 2² = 61643033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61642995 and 61643013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61643033) 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, 11862 + ... + 16247.

It is an arithmetic number, because the mean of its divisors is an integer number (5565780).

Almost surely, 2^61643037 is an apocalyptic number.

It is an amenable number.

61643037 is a deficient number, since it is larger than the sum of its proper divisors (27409443).

61643037 is a wasteful number, since it uses less digits than its factorization.

61643037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28172.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 61643037 is about 7851.3079802030. The cubic root of 61643037 is about 395.0281174238.

The spelling of 61643037 in words is "sixty-one million, six hundred forty-three thousand, thirty-seven".