155799380747 has 2 divisors, whose sum is σ = 155799380748. Its totient is φ = 155799380746.

The previous prime is 155799380717. The next prime is 155799380843. The reversal of 155799380747 is 747083997551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155799380747 - 2⁸ = 155799380491 is a prime.

It is a super-2 number, since 2×155799380747² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155799380717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77899690373 + 77899690374.

It is an arithmetic number, because the mean of its divisors is an integer number (77899690374).

Almost surely, 2^155799380747 is an apocalyptic number.

155799380747 is a deficient number, since it is larger than the sum of its proper divisors (1).

155799380747 is an equidigital number, since it uses as much as digits as its factorization.

155799380747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66679200, while the sum is 65.

The spelling of 155799380747 in words is "one hundred fifty-five billion, seven hundred ninety-nine million, three hundred eighty thousand, seven hundred forty-seven".