61377569 has 8 divisors (see below), whose sum is σ = 67096512. Its totient is φ = 55681840.

The previous prime is 61377553. The next prime is 61377571. The reversal of 61377569 is 96577316.

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 61377569 - 2⁴ = 61377553 is a prime.

It is a super-2 number, since 2×61377569² = 7534411952699522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61377539) 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, 14 + ... + 11079.

It is an arithmetic number, because the mean of its divisors is an integer number (8387064).

Almost surely, 2^61377569 is an apocalyptic number.

It is an amenable number.

61377569 is a deficient number, since it is larger than the sum of its proper divisors (5718943).

61377569 is a wasteful number, since it uses less digits than its factorization.

61377569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11607.

The product of its digits is 238140, while the sum is 44.

The square root of 61377569 is about 7834.3837664490. The cubic root of 61377569 is about 394.4602337453.

The spelling of 61377569 in words is "sixty-one million, three hundred seventy-seven thousand, five hundred sixty-nine".