155430649 has 8 divisors (see below), whose sum is σ = 170076960. Its totient is φ = 140870400.

The previous prime is 155430641. The next prime is 155430679. The reversal of 155430649 is 946034551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155430649 - 2³ = 155430641 is a prime.

It is a super-2 number, since 2×155430649² = 48317373297122402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155430641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17704 + ... + 24985.

It is an arithmetic number, because the mean of its divisors is an integer number (21259620).

Almost surely, 2^155430649 is an apocalyptic number.

It is an amenable number.

155430649 is a deficient number, since it is larger than the sum of its proper divisors (14646311).

155430649 is a wasteful number, since it uses less digits than its factorization.

155430649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43031.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 155430649 is about 12467.1828814693. The cubic root of 155430649 is about 537.6655616897.

The spelling of 155430649 in words is "one hundred fifty-five million, four hundred thirty thousand, six hundred forty-nine".