61616622111565 has 16 divisors (see below), whose sum is σ = 77884433464320. Its totient is φ = 46667167122240.

The previous prime is 61616622111563. The next prime is 61616622111589. The reversal of 61616622111565 is 56511122661616.

It is not a de Polignac number, because 61616622111565 - 2¹ = 61616622111563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616622111563) 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, 220321174 + ... + 220600663.

It is an arithmetic number, because the mean of its divisors is an integer number (4867777091520).

Almost surely, 2^{61616622111565} is an apocalyptic number.

It is an amenable number.

61616622111565 is a deficient number, since it is larger than the sum of its proper divisors (16267811352755).

61616622111565 is a wasteful number, since it uses less digits than its factorization.

61616622111565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440923332.

The product of its digits is 777600, while the sum is 49.

The spelling of 61616622111565 in words is "sixty-one trillion, six hundred sixteen billion, six hundred twenty-two million, one hundred eleven thousand, five hundred sixty-five".