61601510616667 has 16 divisors (see below), whose sum is σ = 71563963299840. Its totient is φ = 51934699825632.

The previous prime is 61601510616593. The next prime is 61601510616671. The reversal of 61601510616667 is 76661601510616.

It is a cyclic number.

It is not a de Polignac number, because 61601510616667 - 2⁷ = 61601510616539 is a prime.

It is a super-2 number, since 2×61601510616667² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61601510617667) 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, 211632388 + ... + 211923265.

It is an arithmetic number, because the mean of its divisors is an integer number (4472747706240).

Almost surely, 2^{61601510616667} is an apocalyptic number.

61601510616667 is a deficient number, since it is larger than the sum of its proper divisors (9962452683173).

61601510616667 is a wasteful number, since it uses less digits than its factorization.

61601510616667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423556002.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 61601510616667 in words is "sixty-one trillion, six hundred one billion, five hundred ten million, six hundred sixteen thousand, six hundred sixty-seven".