155669380974 has 12 divisors (see below), whose sum is σ = 337283658816. Its totient is φ = 51889793652.

The previous prime is 155669380969. The next prime is 155669381017. The reversal of 155669380974 is 479083966551.

155669380974 is a `hidden beast` number, since 1 + 556 + 6 + 9 + 3 + 8 + 0 + 9 + 74 = 666.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 4324149454 + ... + 4324149489.

It is an arithmetic number, because the mean of its divisors is an integer number (28106971568).

Almost surely, 2^155669380974 is an apocalyptic number.

155669380974 is an abundant number, since it is smaller than the sum of its proper divisors (181614277842).

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

155669380974 is a wasteful number, since it uses less digits than its factorization.

155669380974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648298951 (or 8648298948 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 155669380974 in words is "one hundred fifty-five billion, six hundred sixty-nine million, three hundred eighty thousand, nine hundred seventy-four".