61436418 has 8 divisors (see below), whose sum is σ = 122872848. Its totient is φ = 20478804.

The previous prime is 61436407. The next prime is 61436423. The reversal of 61436418 is 81463416.

It is a sphenic number, since it is the product of 3 distinct primes.

61436418 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5119696 + ... + 5119707.

It is an arithmetic number, because the mean of its divisors is an integer number (15359106).

Almost surely, 2^61436418 is an apocalyptic number.

61436418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61436418 is a wasteful number, since it uses less digits than its factorization.

61436418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10239408.

The product of its digits is 13824, while the sum is 33.

The square root of 61436418 is about 7838.1386821107. The cubic root of 61436418 is about 394.5862633657.

It can be divided in two parts, 6143 and 6418, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 61436418 in words is "sixty-one million, four hundred thirty-six thousand, four hundred eighteen".