61404550 has 12 divisors (see below), whose sum is σ = 114212556. Its totient is φ = 24561800.

The previous prime is 61404487. The next prime is 61404569. The reversal of 61404550 is 5540416.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 613996 + ... + 614095.

It is an arithmetic number, because the mean of its divisors is an integer number (9517713).

Almost surely, 2^61404550 is an apocalyptic number.

61404550 is a deficient number, since it is larger than the sum of its proper divisors (52808006).

61404550 is a wasteful number, since it uses less digits than its factorization.

61404550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228103 (or 1228098 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 61404550 is about 7836.1055378294. The cubic root of 61404550 is about 394.5180256097.

Adding to 61404550 its reverse (5540416), we get a palindrome (66944966).

The spelling of 61404550 in words is "sixty-one million, four hundred four thousand, five hundred fifty".