61541787 has 8 divisors (see below), whose sum is σ = 82702336. Its totient is φ = 40704552.

The previous prime is 61541771. The next prime is 61541797. The reversal of 61541787 is 78714516.

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

It is not a de Polignac number, because 61541787 - 2⁴ = 61541771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61541797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80383 + ... + 81144.

It is an arithmetic number, because the mean of its divisors is an integer number (10337792).

Almost surely, 2^61541787 is an apocalyptic number.

61541787 is a deficient number, since it is larger than the sum of its proper divisors (21160549).

61541787 is a wasteful number, since it uses less digits than its factorization.

61541787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161657.

The product of its digits is 47040, while the sum is 39.

The square root of 61541787 is about 7844.8573600799. The cubic root of 61541787 is about 394.8117182041.

The spelling of 61541787 in words is "sixty-one million, five hundred forty-one thousand, seven hundred eighty-seven".