155742056 has 8 divisors (see below), whose sum is σ = 292016370. Its totient is φ = 77871024.

The previous prime is 155742053. The next prime is 155742061. The reversal of 155742056 is 650247551.

It can be written as a sum of positive squares in only one way, i.e., 117722500 + 38019556 = 10850^2 + 6166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (155742053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9733871 + ... + 9733886.

Almost surely, 2^155742056 is an apocalyptic number.

It is an amenable number.

155742056 is a deficient number, since it is larger than the sum of its proper divisors (136274314).

155742056 is a wasteful number, since it uses less digits than its factorization.

155742056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19467763 (or 19467759 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 155742056 is about 12479.6657006508. The cubic root of 155742056 is about 538.0243950925.

The spelling of 155742056 in words is "one hundred fifty-five million, seven hundred forty-two thousand, fifty-six".