161155617070651 has 6 divisors (see below), whose sum is σ = 187466738225100. Its totient is φ = 138133386060516.

The previous prime is 161155617070649. The next prime is 161155617070681. The reversal of 161155617070651 is 156070716551161.

It is not a de Polignac number, because 161155617070651 - 2¹ = 161155617070649 is a prime.

It is a super-2 number, since 2×161155617070651² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161155617070681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1644445072101 + ... + 1644445072198.

It is an arithmetic number, because the mean of its divisors is an integer number (31244456370850).

Almost surely, 2^{161155617070651} is an apocalyptic number.

161155617070651 is a deficient number, since it is larger than the sum of its proper divisors (26311121154449).

161155617070651 is an equidigital number, since it uses as much as digits as its factorization.

161155617070651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288890144313 (or 3288890144306 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 52.

The spelling of 161155617070651 in words is "one hundred sixty-one trillion, one hundred fifty-five billion, six hundred seventeen million, seventy thousand, six hundred fifty-one".