155206113407 has 2 divisors, whose sum is σ = 155206113408. Its totient is φ = 155206113406.

The previous prime is 155206113343. The next prime is 155206113427. The reversal of 155206113407 is 704311602551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155206113407 - 2⁶ = 155206113343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155206113427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77603056703 + 77603056704.

It is an arithmetic number, because the mean of its divisors is an integer number (77603056704).

Almost surely, 2^155206113407 is an apocalyptic number.

155206113407 is a deficient number, since it is larger than the sum of its proper divisors (1).

155206113407 is an equidigital number, since it uses as much as digits as its factorization.

155206113407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

Adding to 155206113407 its reverse (704311602551), we get a palindrome (859517715958).

The spelling of 155206113407 in words is "one hundred fifty-five billion, two hundred six million, one hundred thirteen thousand, four hundred seven".