155540734 has 4 divisors (see below), whose sum is σ = 233311104. Its totient is φ = 77770366.

The previous prime is 155540689. The next prime is 155540747. The reversal of 155540734 is 437045551.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155540734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38885182 + ... + 38885185.

It is an arithmetic number, because the mean of its divisors is an integer number (58327776).

Almost surely, 2^155540734 is an apocalyptic number.

155540734 is a deficient number, since it is larger than the sum of its proper divisors (77770370).

155540734 is an equidigital number, since it uses as much as digits as its factorization.

155540734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77770369.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 155540734 is about 12471.5970909904. The cubic root of 155540734 is about 537.7924670450.

The spelling of 155540734 in words is "one hundred fifty-five million, five hundred forty thousand, seven hundred thirty-four".