61478751 has 8 divisors (see below), whose sum is σ = 82010880. Its totient is φ = 40966232.

The previous prime is 61478723. The next prime is 61478759. The reversal of 61478751 is 15787416.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61478751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61478759) 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, 5680 + ... + 12458.

It is an arithmetic number, because the mean of its divisors is an integer number (10251360).

Almost surely, 2^61478751 is an apocalyptic number.

61478751 is a deficient number, since it is larger than the sum of its proper divisors (20532129).

61478751 is a wasteful number, since it uses less digits than its factorization.

61478751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805.

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

The square root of 61478751 is about 7840.8386668774. The cubic root of 61478751 is about 394.6768729511.

The spelling of 61478751 in words is "sixty-one million, four hundred seventy-eight thousand, seven hundred fifty-one".