61488771 has 8 divisors (see below), whose sum is σ = 82056960. Its totient is φ = 40956552.

The previous prime is 61488767. The next prime is 61488773. The reversal of 61488771 is 17788416.

It is a happy number.

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

It is not a de Polignac number, because 61488771 - 2² = 61488767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61488773) 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, 4711 + ... + 12048.

It is an arithmetic number, because the mean of its divisors is an integer number (10257120).

Almost surely, 2^61488771 is an apocalyptic number.

61488771 is a deficient number, since it is larger than the sum of its proper divisors (20568189).

61488771 is a wasteful number, since it uses less digits than its factorization.

61488771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17985.

The product of its digits is 75264, while the sum is 42.

The square root of 61488771 is about 7841.4776031052. The cubic root of 61488771 is about 394.6983136786.

The spelling of 61488771 in words is "sixty-one million, four hundred eighty-eight thousand, seven hundred seventy-one".