1961906196601 has 8 divisors (see below), whose sum is σ = 2114476595784. Its totient is φ = 1809572160000.

The previous prime is 1961906196589. The next prime is 1961906196647. The reversal of 1961906196601 is 1066916091691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 99707535225 + 1862198661376 = 315765^2 + 1364624^2 .

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-1961906196601 is a prime.

It is a super-2 number, since 2×1961906196601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961906196661) 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, 59073400 + ... + 59106601.

It is an arithmetic number, because the mean of its divisors is an integer number (264309574473).

Almost surely, 2^{1961906196601} is an apocalyptic number.

It is an amenable number.

1961906196601 is a deficient number, since it is larger than the sum of its proper divisors (152570399183).

1961906196601 is a wasteful number, since it uses less digits than its factorization.

1961906196601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118181291.

The product of its (nonzero) digits is 944784, while the sum is 55.

The spelling of 1961906196601 in words is "one trillion, nine hundred sixty-one billion, nine hundred six million, one hundred ninety-six thousand, six hundred one".