156003425055661 has 4 divisors (see below), whose sum is σ = 156006256234752. Its totient is φ = 156000593876572.

The previous prime is 156003425055607. The next prime is 156003425055689. The reversal of 156003425055661 is 166550524300651.

It is a happy number.

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 156003425055661 - 2¹³ = 156003425047469 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 (156003425055601) 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, 1415506891 + ... + 1415617096.

It is an arithmetic number, because the mean of its divisors is an integer number (39001564058688).

Almost surely, 2^{156003425055661} is an apocalyptic number.

It is an amenable number.

156003425055661 is a deficient number, since it is larger than the sum of its proper divisors (2831179091).

156003425055661 is an equidigital number, since it uses as much as digits as its factorization.

156003425055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831179090.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 156003425055661 in words is "one hundred fifty-six trillion, three billion, four hundred twenty-five million, fifty-five thousand, six hundred sixty-one".