61457759 has 8 divisors (see below), whose sum is σ = 67365120. Its totient is φ = 55603800.

The previous prime is 61457749. The next prime is 61457801. The reversal of 61457759 is 95775416.

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

It is a cyclic number.

It is not a de Polignac number, because 61457759 - 2⁴ = 61457743 is a prime.

It is a super-2 number, since 2×61457759² = 7554112282604162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61457719) 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, 10919 + ... + 15560.

It is an arithmetic number, because the mean of its divisors is an integer number (8420640).

Almost surely, 2^61457759 is an apocalyptic number.

61457759 is a deficient number, since it is larger than the sum of its proper divisors (5907361).

61457759 is a wasteful number, since it uses less digits than its factorization.

61457759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26701.

The product of its digits is 264600, while the sum is 44.

The square root of 61457759 is about 7839.4999202755. The cubic root of 61457759 is about 394.6319468591.

The spelling of 61457759 in words is "sixty-one million, four hundred fifty-seven thousand, seven hundred fifty-nine".