155502025541 has 4 divisors (see below), whose sum is σ = 164649203532. Its totient is φ = 146354847552.

The previous prime is 155502025517. The next prime is 155502025579. The reversal of 155502025541 is 145520205551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145520205551 = 7 ⋅20788600793.

It can be written as a sum of positive squares in 2 ways, for example, as 86098230625 + 69403794916 = 293425^2 + 263446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155502025541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155502025241) 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, 4573588970 + ... + 4573589003.

It is an arithmetic number, because the mean of its divisors is an integer number (41162300883).

Almost surely, 2^155502025541 is an apocalyptic number.

It is an amenable number.

155502025541 is a deficient number, since it is larger than the sum of its proper divisors (9147177991).

155502025541 is an equidigital number, since it uses as much as digits as its factorization.

155502025541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147177990.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 155502025541 in words is "one hundred fifty-five billion, five hundred two million, twenty-five thousand, five hundred forty-one".