61481187 has 18 divisors (see below), whose sum is σ = 92278732. Its totient is φ = 40905972.

The previous prime is 61481183. The next prime is 61481213. The reversal of 61481187 is 78118416.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 61481187 - 2² = 61481183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61481183) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 121978 + ... + 122480.

Almost surely, 2^61481187 is an apocalyptic number.

61481187 is a deficient number, since it is larger than the sum of its proper divisors (30797545).

61481187 is an frugal number, since it uses more digits than its factorization.

61481187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 506 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 61481187 is about 7840.9940058643. The cubic root of 61481187 is about 394.6820857016.

The spelling of 61481187 in words is "sixty-one million, four hundred eighty-one thousand, one hundred eighty-seven".