61769281 has 8 divisors (see below), whose sum is σ = 71254080. Its totient is φ = 52449648.

The previous prime is 61769261. The next prime is 61769287. The reversal of 61769281 is 18296716.

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 61769281 - 2⁵ = 61769249 is a prime.

It is a super-2 number, since 2×61769281² = 7630888150513922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61769287) 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, 40486 + ... + 41983.

It is an arithmetic number, because the mean of its divisors is an integer number (8906760).

Almost surely, 2^61769281 is an apocalyptic number.

It is an amenable number.

61769281 is a deficient number, since it is larger than the sum of its proper divisors (9484799).

61769281 is a wasteful number, since it uses less digits than its factorization.

61769281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82583.

The product of its digits is 36288, while the sum is 40.

The square root of 61769281 is about 7859.3435476508. The cubic root of 61769281 is about 395.2976040599.

The spelling of 61769281 in words is "sixty-one million, seven hundred sixty-nine thousand, two hundred eighty-one".