155198243896 has 8 divisors (see below), whose sum is σ = 290996707320. Its totient is φ = 77599121944.

The previous prime is 155198243891. The next prime is 155198243903. The reversal of 155198243896 is 698342891551.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155198243891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9699890236 + ... + 9699890251.

It is an arithmetic number, because the mean of its divisors is an integer number (36374588415).

Almost surely, 2^155198243896 is an apocalyptic number.

It is an amenable number.

155198243896 is a deficient number, since it is larger than the sum of its proper divisors (135798463424).

155198243896 is a wasteful number, since it uses less digits than its factorization.

155198243896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19399780493 (or 19399780489 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 61.

The spelling of 155198243896 in words is "one hundred fifty-five billion, one hundred ninety-eight million, two hundred forty-three thousand, eight hundred ninety-six".