61990536 has 16 divisors (see below), whose sum is σ = 154976400. Its totient is φ = 20663504.

The previous prime is 61990531. The next prime is 61990553. The reversal of 61990536 is 63509916.

61990536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×61990536³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61990494 and 61990503.

It is not an unprimeable number, because it can be changed into a prime (61990531) 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 in 3 ways as a sum of consecutive naturals, for example, 1291446 + ... + 1291493.

It is an arithmetic number, because the mean of its divisors is an integer number (9686025).

Almost surely, 2^61990536 is an apocalyptic number.

It is an amenable number.

61990536 is an abundant number, since it is smaller than the sum of its proper divisors (92985864).

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

61990536 is a wasteful number, since it uses less digits than its factorization.

61990536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582948 (or 2582944 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 61990536 is about 7873.4068864755. The cubic root of 61990536 is about 395.7690215098.

It can be divided in two parts, 619905 and 36, that added together give a triangular number (619941 = T₁₁₁₃).

The spelling of 61990536 in words is "sixty-one million, nine hundred ninety thousand, five hundred thirty-six".