155398719547 has 2 divisors, whose sum is σ = 155398719548. Its totient is φ = 155398719546.

The previous prime is 155398719529. The next prime is 155398719617. The reversal of 155398719547 is 745917893551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155398719547 is a prime.

It is not a weakly prime, because it can be changed into another prime (155398719647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77699359773 + 77699359774.

It is an arithmetic number, because the mean of its divisors is an integer number (77699359774).

Almost surely, 2^155398719547 is an apocalyptic number.

155398719547 is a deficient number, since it is larger than the sum of its proper divisors (1).

155398719547 is an equidigital number, since it uses as much as digits as its factorization.

155398719547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628000, while the sum is 64.

The spelling of 155398719547 in words is "one hundred fifty-five billion, three hundred ninety-eight million, seven hundred nineteen thousand, five hundred forty-seven".