156754340121641 has 4 divisors (see below), whose sum is σ = 156998126032272. Its totient is φ = 156510554211012.

The previous prime is 156754340121619. The next prime is 156754340121677. The reversal of 156754340121641 is 146121043457651.

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 156754340121641 - 2¹⁸ = 156754339859497 is a prime.

It is a super-2 number, since 2×156754340121641² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156754340121641.

It is not an unprimeable number, because it can be changed into a prime (156754340121941) 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, 121892954351 + ... + 121892955636.

It is an arithmetic number, because the mean of its divisors is an integer number (39249531508068).

Almost surely, 2^{156754340121641} is an apocalyptic number.

It is an amenable number.

156754340121641 is a deficient number, since it is larger than the sum of its proper divisors (243785910631).

156754340121641 is an equidigital number, since it uses as much as digits as its factorization.

156754340121641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243785910630.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 156754340121641 in words is "one hundred fifty-six trillion, seven hundred fifty-four billion, three hundred forty million, one hundred twenty-one thousand, six hundred forty-one".