611501656161 has 16 divisors (see below), whose sum is σ = 893341056960. Its totient is φ = 368988688320.

The previous prime is 611501656159. The next prime is 611501656163. The reversal of 611501656161 is 161656105116.

It is an interprime number because it is at equal distance from previous prime (611501656159) and next prime (611501656163).

It is not a de Polignac number, because 611501656161 - 2¹ = 611501656159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611501656163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40451730 + ... + 40466843.

It is an arithmetic number, because the mean of its divisors is an integer number (55833816060).

Almost surely, 2^611501656161 is an apocalyptic number.

It is an amenable number.

611501656161 is a deficient number, since it is larger than the sum of its proper divisors (281839400799).

611501656161 is a wasteful number, since it uses less digits than its factorization.

611501656161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80918816.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 611501656161 in words is "six hundred eleven billion, five hundred one million, six hundred fifty-six thousand, one hundred sixty-one".