155415538494 has 24 divisors (see below), whose sum is σ = 336746751120. Its totient is φ = 51803166528.

The previous prime is 155415538433. The next prime is 155415538651. The reversal of 155415538494 is 494835514551.

155415538494 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 1 + 553 + 84 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 155415538494.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351862 + ... + 659270.

It is an arithmetic number, because the mean of its divisors is an integer number (14031114630).

Almost surely, 2^155415538494 is an apocalyptic number.

155415538494 is an abundant number, since it is smaller than the sum of its proper divisors (181331212626).

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

155415538494 is a wasteful number, since it uses less digits than its factorization.

155415538494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335504 (or 335501 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The spelling of 155415538494 in words is "one hundred fifty-five billion, four hundred fifteen million, five hundred thirty-eight thousand, four hundred ninety-four".