61630555 has 8 divisors (see below), whose sum is σ = 84521952. Its totient is φ = 42260928.

The previous prime is 61630519. The next prime is 61630577. The reversal of 61630555 is 55503616.

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 61630555 - 2¹⁵ = 61597787 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880402 + ... + 880471.

It is an arithmetic number, because the mean of its divisors is an integer number (10565244).

Almost surely, 2^61630555 is an apocalyptic number.

61630555 is a deficient number, since it is larger than the sum of its proper divisors (22891397).

61630555 is a wasteful number, since it uses less digits than its factorization.

61630555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760885.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 61630555 is about 7850.5130405598. The cubic root of 61630555 is about 395.0014527533.

The spelling of 61630555 in words is "sixty-one million, six hundred thirty thousand, five hundred fifty-five".