155601262408 has 8 divisors (see below), whose sum is σ = 291752367030. Its totient is φ = 77800631200.

The previous prime is 155601262393. The next prime is 155601262409. The reversal of 155601262408 is 804262106551.

It can be written as a sum of positive squares in only one way, i.e., 106405135204 + 49196127204 = 326198^2 + 221802^2 .

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 (155601262409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9725078893 + ... + 9725078908.

Almost surely, 2^155601262408 is an apocalyptic number.

It is an amenable number.

155601262408 is a deficient number, since it is larger than the sum of its proper divisors (136151104622).

155601262408 is a wasteful number, since it uses less digits than its factorization.

155601262408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19450157807 (or 19450157803 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

Adding to 155601262408 its reverse (804262106551), we get a palindrome (959863368959).

The spelling of 155601262408 in words is "one hundred fifty-five billion, six hundred one million, two hundred sixty-two thousand, four hundred eight".