155397697258 has 16 divisors (see below), whose sum is σ = 239544748296. Its totient is φ = 75561557760.

The previous prime is 155397697229. The next prime is 155397697303. The reversal of 155397697258 is 852796793551.

It can be written as a sum of positive squares in 4 ways, for example, as 61833287569 + 93564409689 = 248663^2 + 305883^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155397697193 and 155397697202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001641 + ... + 3052972.

Almost surely, 2^155397697258 is an apocalyptic number.

155397697258 is a deficient number, since it is larger than the sum of its proper divisors (84147051038).

155397697258 is a wasteful number, since it uses less digits than its factorization.

155397697258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6054969.

The product of its digits is 142884000, while the sum is 67.

The spelling of 155397697258 in words is "one hundred fifty-five billion, three hundred ninety-seven million, six hundred ninety-seven thousand, two hundred fifty-eight".