155407340740811 has 2 divisors, whose sum is σ = 155407340740812. Its totient is φ = 155407340740810.

The previous prime is 155407340740801. The next prime is 155407340740961. The reversal of 155407340740811 is 118047043704551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155407340740811 is a prime.

It is a super-2 number, since 2×155407340740811² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155407340740811.

It is not a weakly prime, because it can be changed into another prime (155407340740801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77703670370405 + 77703670370406.

It is an arithmetic number, because the mean of its divisors is an integer number (77703670370406).

Almost surely, 2^{155407340740811} is an apocalyptic number.

155407340740811 is a deficient number, since it is larger than the sum of its proper divisors (1).

155407340740811 is an equidigital number, since it uses as much as digits as its factorization.

155407340740811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 155407340740811 in words is "one hundred fifty-five trillion, four hundred seven billion, three hundred forty million, seven hundred forty thousand, eight hundred eleven".