61438550 has 24 divisors (see below), whose sum is σ = 114501600. Its totient is φ = 24526880.

The previous prime is 61438523. The next prime is 61438579. The reversal of 61438550 is 5583416.

It is a happy number.

It is a super-2 number, since 2×61438550² = 7549390852205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35096 + ... + 36804.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 2^61438550 is an apocalyptic number.

61438550 is a deficient number, since it is larger than the sum of its proper divisors (53063050).

61438550 is a wasteful number, since it uses less digits than its factorization.

61438550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 61438550 is about 7838.2746826071. The cubic root of 61438550 is about 394.5908276953.

The spelling of 61438550 in words is "sixty-one million, four hundred thirty-eight thousand, five hundred fifty".