61516410 has 16 divisors (see below), whose sum is σ = 147639456. Its totient is φ = 16404368.

The previous prime is 61516391. The next prime is 61516423. The reversal of 61516410 is 1461516.

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, 1025244 + ... + 1025303.

It is an arithmetic number, because the mean of its divisors is an integer number (9227466).

Almost surely, 2^61516410 is an apocalyptic number.

61516410 is an abundant number, since it is smaller than the sum of its proper divisors (86123046).

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

61516410 is a wasteful number, since it uses less digits than its factorization.

61516410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050557.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61516410 is about 7843.2397642811. The cubic root of 61516410 is about 394.7574433505.

Adding to 61516410 its reverse (1461516), we get a palindrome (62977926).

It can be divided in two parts, 6151 and 6410, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 61516410 in words is "sixty-one million, five hundred sixteen thousand, four hundred ten".