155603252402 has 8 divisors (see below), whose sum is σ = 251359100076. Its totient is φ = 71816885712.

The previous prime is 155603252333. The next prime is 155603252407. The reversal of 155603252402 is 204252306551.

It can be written as a sum of positive squares in 2 ways, for example, as 154377482281 + 1225770121 = 392909^2 + 35011^2 .

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

It is not an unprimeable number, because it can be changed into a prime (155603252407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2992370213 + ... + 2992370264.

Almost surely, 2^155603252402 is an apocalyptic number.

155603252402 is a deficient number, since it is larger than the sum of its proper divisors (95755847674).

155603252402 is a wasteful number, since it uses less digits than its factorization.

155603252402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984740492.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 155603252402 its reverse (204252306551), we get a palindrome (359855558953).

The spelling of 155603252402 in words is "one hundred fifty-five billion, six hundred three million, two hundred fifty-two thousand, four hundred two".