155145674 has 4 divisors (see below), whose sum is σ = 232718514. Its totient is φ = 77572836.

The previous prime is 155145611. The next prime is 155145709. The reversal of 155145674 is 476541551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476541551 = 103 ⋅4626617.

It can be written as a sum of positive squares in only one way, i.e., 134397649 + 20748025 = 11593^2 + 4555^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38786417 + ... + 38786420.

Almost surely, 2^155145674 is an apocalyptic number.

155145674 is a deficient number, since it is larger than the sum of its proper divisors (77572840).

155145674 is an equidigital number, since it uses as much as digits as its factorization.

155145674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77572839.

The product of its digits is 84000, while the sum is 38.

The square root of 155145674 is about 12455.7486326595. The cubic root of 155145674 is about 537.3367655754.

The spelling of 155145674 in words is "one hundred fifty-five million, one hundred forty-five thousand, six hundred seventy-four".