561663511514606 has 4 divisors (see below), whose sum is σ = 842495267271912. Its totient is φ = 280831755757302.

The previous prime is 561663511514597. The next prime is 561663511514657. The reversal of 561663511514606 is 606415115366165.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140415877878650 + ... + 140415877878653.

It is an arithmetic number, because the mean of its divisors is an integer number (210623816817978).

Almost surely, 2^{561663511514606} is an apocalyptic number.

561663511514606 is a deficient number, since it is larger than the sum of its proper divisors (280831755757306).

561663511514606 is a wasteful number, since it uses less digits than its factorization.

561663511514606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280831755757305.

The product of its (nonzero) digits is 11664000, while the sum is 56.

The spelling of 561663511514606 in words is "five hundred sixty-one trillion, six hundred sixty-three billion, five hundred eleven million, five hundred fourteen thousand, six hundred six".