1961256216037 has 8 divisors (see below), whose sum is σ = 1977345339392. Its totient is φ = 1945177189200.

The previous prime is 1961256216001. The next prime is 1961256216061. The reversal of 1961256216037 is 7306126521691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961256216037 - 2³¹ = 1959108732389 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 (1961256226037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133789 + ... + 2911282.

It is an arithmetic number, because the mean of its divisors is an integer number (247168167424).

Almost surely, 2^{1961256216037} is an apocalyptic number.

It is an amenable number.

1961256216037 is a deficient number, since it is larger than the sum of its proper divisors (16089123355).

1961256216037 is a wasteful number, since it uses less digits than its factorization.

1961256216037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048259.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 1961256216037 in words is "one trillion, nine hundred sixty-one billion, two hundred fifty-six million, two hundred sixteen thousand, thirty-seven".