1961882373551 has 8 divisors (see below), whose sum is σ = 2186618125680. Its totient is φ = 1749294499968.

The previous prime is 1961882373533. The next prime is 1961882373553. The reversal of 1961882373551 is 1553732881691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961882373551 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 (1961882373553) 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, 3036969296 + ... + 3036969941.

It is an arithmetic number, because the mean of its divisors is an integer number (273327265710).

Almost surely, 2^{1961882373551} is an apocalyptic number.

1961882373551 is a deficient number, since it is larger than the sum of its proper divisors (224735752129).

1961882373551 is a wasteful number, since it uses less digits than its factorization.

1961882373551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073939273.

The product of its digits is 10886400, while the sum is 59.

The spelling of 1961882373551 in words is "one trillion, nine hundred sixty-one billion, eight hundred eighty-two million, three hundred seventy-three thousand, five hundred fifty-one".