155397175494 has 64 divisors (see below), whose sum is σ = 349733687040. Its totient is φ = 45617109120.

The previous prime is 155397175481. The next prime is 155397175579. The reversal of 155397175494 is 494571793551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 420277 + ... + 698159.

It is an arithmetic number, because the mean of its divisors is an integer number (5464588860).

Almost surely, 2^155397175494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155397175494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174866843520).

155397175494 is an abundant number, since it is smaller than the sum of its proper divisors (194336511546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155397175494 is a wasteful number, since it uses less digits than its factorization.

155397175494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278165.

The product of its digits is 23814000, while the sum is 60.

It can be divided in two parts, 155397 and 175494, that added together give a triangular number (330891 = T₈₁₃).

The spelling of 155397175494 in words is "one hundred fifty-five billion, three hundred ninety-seven million, one hundred seventy-five thousand, four hundred ninety-four".