61544436 has 24 divisors (see below), whose sum is σ = 143742144. Its totient is φ = 20495040.

The previous prime is 61544423. The next prime is 61544449. The reversal of 61544436 is 63444516.

It is an interprime number because it is at equal distance from previous prime (61544423) and next prime (61544449).

It is a junction number, because it is equal to n+sod(n) for n = 61544397 and 61544406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16041 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (5989256).

Almost surely, 2^61544436 is an apocalyptic number.

It is an amenable number.

61544436 is an abundant number, since it is smaller than the sum of its proper divisors (82197708).

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

61544436 is a wasteful number, since it uses less digits than its factorization.

61544436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951 (or 4949 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 61544436 is about 7845.0261949849. The cubic root of 61544436 is about 394.8173828713.

The spelling of 61544436 in words is "sixty-one million, five hundred forty-four thousand, four hundred thirty-six".