61101005506 has 4 divisors (see below), whose sum is σ = 91651508262. Its totient is φ = 30550502752.

The previous prime is 61101005489. The next prime is 61101005521. The reversal of 61101005506 is 60550010116.

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

It can be written as a sum of positive squares in only one way, i.e., 39670680625 + 21430324881 = 199175^2 + 146391^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15275251375 + ... + 15275251378.

Almost surely, 2^61101005506 is an apocalyptic number.

61101005506 is a deficient number, since it is larger than the sum of its proper divisors (30550502756).

61101005506 is a wasteful number, since it uses less digits than its factorization.

61101005506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30550502755.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 61101005506 in words is "sixty-one billion, one hundred one million, five thousand, five hundred six".