155698111397 has 8 divisors (see below), whose sum is σ = 161094856440. Its totient is φ = 150303222720.

The previous prime is 155698111367. The next prime is 155698111421. The reversal of 155698111397 is 793111896551.

It is a Cunningham number, because it is equal to 394586²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 81643918756 + 74054192641 = 285734^2 + 272129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155698111397 - 2⁶ = 155698111333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155698111337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292358 + ... + 629975.

It is an arithmetic number, because the mean of its divisors is an integer number (20136857055).

Almost surely, 2^155698111397 is an apocalyptic number.

It is an amenable number.

155698111397 is a deficient number, since it is larger than the sum of its proper divisors (5396745043).

155698111397 is an equidigital number, since it uses as much as digits as its factorization.

155698111397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928183.

The product of its digits is 2041200, while the sum is 56.

The spelling of 155698111397 in words is "one hundred fifty-five billion, six hundred ninety-eight million, one hundred eleven thousand, three hundred ninety-seven".