61156611000671 has 4 divisors (see below), whose sum is σ = 61156771854432. Its totient is φ = 61156450146912.

The previous prime is 61156611000631. The next prime is 61156611000677. The reversal of 61156611000671 is 17600011665116.

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 61156611000671 - 2¹⁸ = 61156610738527 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 (61156611000677) 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, 79855226 + ... + 80617431.

It is an arithmetic number, because the mean of its divisors is an integer number (15289192963608).

Almost surely, 2^{61156611000671} is an apocalyptic number.

61156611000671 is a deficient number, since it is larger than the sum of its proper divisors (160853761).

61156611000671 is a wasteful number, since it uses less digits than its factorization.

61156611000671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160853760.

The product of its (nonzero) digits is 45360, while the sum is 41.

Adding to 61156611000671 its reverse (17600011665116), we get a palindrome (78756622665787).

The spelling of 61156611000671 in words is "sixty-one trillion, one hundred fifty-six billion, six hundred eleven million, six hundred seventy-one", and thus it is an aban number.