155651061091 has 2 divisors, whose sum is σ = 155651061092. Its totient is φ = 155651061090.

The previous prime is 155651061067. The next prime is 155651061119. The reversal of 155651061091 is 190160156551.

155651061091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (190160156551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155651061091 is a prime.

It is a super-2 number, since 2×155651061091² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155651061191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77825530545 + 77825530546.

It is an arithmetic number, because the mean of its divisors is an integer number (77825530546).

Almost surely, 2^155651061091 is an apocalyptic number.

155651061091 is a deficient number, since it is larger than the sum of its proper divisors (1).

155651061091 is an equidigital number, since it uses as much as digits as its factorization.

155651061091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 40.

The spelling of 155651061091 in words is "one hundred fifty-five billion, six hundred fifty-one million, sixty-one thousand, ninety-one".