61161554 has 8 divisors (see below), whose sum is σ = 95731200. Its totient is φ = 29251156.

The previous prime is 61161539. The next prime is 61161559. The reversal of 61161554 is 45516116.

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

It is not an unprimeable number, because it can be changed into a prime (61161559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664754 + ... + 664845.

It is an arithmetic number, because the mean of its divisors is an integer number (11966400).

Almost surely, 2^61161554 is an apocalyptic number.

61161554 is a deficient number, since it is larger than the sum of its proper divisors (34569646).

61161554 is a wasteful number, since it uses less digits than its factorization.

61161554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329624.

The product of its digits is 3600, while the sum is 29.

The square root of 61161554 is about 7820.5852722159. The cubic root of 61161554 is about 393.9969293825.

The spelling of 61161554 in words is "sixty-one million, one hundred sixty-one thousand, five hundred fifty-four".