155348417661 has 4 divisors (see below), whose sum is σ = 207131223552. Its totient is φ = 103565611772.

The previous prime is 155348417659. The next prime is 155348417683. The reversal of 155348417661 is 166714843551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155348417661 - 2¹ = 155348417659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155348417641) 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, 25891402941 + ... + 25891402946.

It is an arithmetic number, because the mean of its divisors is an integer number (51782805888).

Almost surely, 2^155348417661 is an apocalyptic number.

It is an amenable number.

155348417661 is a deficient number, since it is larger than the sum of its proper divisors (51782805891).

155348417661 is an equidigital number, since it uses as much as digits as its factorization.

155348417661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51782805890.

The product of its digits is 2419200, while the sum is 51.

The spelling of 155348417661 in words is "one hundred fifty-five billion, three hundred forty-eight million, four hundred seventeen thousand, six hundred sixty-one".