61562555 has 4 divisors (see below), whose sum is σ = 73875072. Its totient is φ = 49250040.

The previous prime is 61562539. The next prime is 61562581. The reversal of 61562555 is 55526516.

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

It is not a de Polignac number, because 61562555 - 2⁴ = 61562539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6156251 + ... + 6156260.

It is an arithmetic number, because the mean of its divisors is an integer number (18468768).

Almost surely, 2^61562555 is an apocalyptic number.

61562555 is a deficient number, since it is larger than the sum of its proper divisors (12312517).

61562555 is a wasteful number, since it uses less digits than its factorization.

61562555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12312516.

The product of its digits is 45000, while the sum is 35.

The square root of 61562555 is about 7846.1809181283. The cubic root of 61562555 is about 394.8561244956.

The spelling of 61562555 in words is "sixty-one million, five hundred sixty-two thousand, five hundred fifty-five".