61623511 has 4 divisors (see below), whose sum is σ = 62316000. Its totient is φ = 60931024.

The previous prime is 61623493. The next prime is 61623539. The reversal of 61623511 is 11532616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61623511 - 2¹⁷ = 61492439 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 (61623571) 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, 346111 + ... + 346288.

It is an arithmetic number, because the mean of its divisors is an integer number (15579000).

Almost surely, 2^61623511 is an apocalyptic number.

61623511 is a deficient number, since it is larger than the sum of its proper divisors (692489).

61623511 is an equidigital number, since it uses as much as digits as its factorization.

61623511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692488.

The product of its digits is 1080, while the sum is 25.

The square root of 61623511 is about 7850.0643946403. The cubic root of 61623511 is about 394.9864034203.

The spelling of 61623511 in words is "sixty-one million, six hundred twenty-three thousand, five hundred eleven".