61616605745401 has 32 divisors (see below), whose sum is σ = 70939267596288. Its totient is φ = 52425602887680.

The previous prime is 61616605745377. The next prime is 61616605745413. The reversal of 61616605745401 is 10454750661616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61616605745401 is a prime.

It is a super-3 number, since 3×61616605745401³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61616605745441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 932887560 + ... + 932953606.

It is an arithmetic number, because the mean of its divisors is an integer number (2216852112384).

Almost surely, 2^{61616605745401} is an apocalyptic number.

It is an amenable number.

61616605745401 is a deficient number, since it is larger than the sum of its proper divisors (9322661850887).

61616605745401 is a wasteful number, since it uses less digits than its factorization.

61616605745401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68041.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 61616605745401 in words is "sixty-one trillion, six hundred sixteen billion, six hundred five million, seven hundred forty-five thousand, four hundred one".