61611377 has 4 divisors (see below), whose sum is σ = 61774320. Its totient is φ = 61448436.

The previous prime is 61611373. The next prime is 61611379. The reversal of 61611377 is 77311616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61611377 - 2² = 61611373 is a prime.

It is a super-2 number, since 2×61611377² = 7591923551672258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61611373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80903 + ... + 81660.

It is an arithmetic number, because the mean of its divisors is an integer number (15443580).

Almost surely, 2^61611377 is an apocalyptic number.

It is an amenable number.

61611377 is a deficient number, since it is larger than the sum of its proper divisors (162943).

61611377 is a wasteful number, since it uses less digits than its factorization.

61611377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162942.

The product of its digits is 5292, while the sum is 32.

The square root of 61611377 is about 7849.2914966894. The cubic root of 61611377 is about 394.9604767377.

The spelling of 61611377 in words is "sixty-one million, six hundred eleven thousand, three hundred seventy-seven".