3961511500161 has 4 divisors (see below), whose sum is σ = 5282015333552. Its totient is φ = 2641007666772.

The previous prime is 3961511500087. The next prime is 3961511500183. The reversal of 3961511500161 is 1610051151693.

3961511500161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 3961511500161 - 2¹³ = 3961511491969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3961511500061) 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, 660251916691 + ... + 660251916696.

It is an arithmetic number, because the mean of its divisors is an integer number (1320503833388).

Almost surely, 2^{3961511500161} is an apocalyptic number.

It is an amenable number.

3961511500161 is a deficient number, since it is larger than the sum of its proper divisors (1320503833391).

3961511500161 is a wasteful number, since it uses less digits than its factorization.

3961511500161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320503833390.

The product of its (nonzero) digits is 24300, while the sum is 39.

The spelling of 3961511500161 in words is "three trillion, nine hundred sixty-one billion, five hundred eleven million, five hundred thousand, one hundred sixty-one".