61773613 has 8 divisors (see below), whose sum is σ = 67674240. Its totient is φ = 55920480.

The previous prime is 61773601. The next prime is 61773623. The reversal of 61773613 is 31637716.

It is a happy number.

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

It is not a de Polignac number, because 61773613 - 2⁵ = 61773581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61773623) 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, 9120 + ... + 14377.

It is an arithmetic number, because the mean of its divisors is an integer number (8459280).

Almost surely, 2^61773613 is an apocalyptic number.

It is an amenable number.

61773613 is a deficient number, since it is larger than the sum of its proper divisors (5900627).

61773613 is a wasteful number, since it uses less digits than its factorization.

61773613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23747.

The product of its digits is 15876, while the sum is 34.

The square root of 61773613 is about 7859.6191383552. The cubic root of 61773613 is about 395.3068448409.

The spelling of 61773613 in words is "sixty-one million, seven hundred seventy-three thousand, six hundred thirteen".