1961448161670 has 64 divisors (see below), whose sum is σ = 5341816304640. Its totient is φ = 511924055904.

The previous prime is 1961448161657. The next prime is 1961448161677. The reversal of 1961448161670 is 761618441691.

It is a happy number.

1961448161670 is a `hidden beast` number, since 1 + 9 + 6 + 14 + 4 + 8 + 1 + 616 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961448161677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77270532 + ... + 77295911.

It is an arithmetic number, because the mean of its divisors is an integer number (83465879760).

Almost surely, 2^{1961448161670} is an apocalyptic number.

1961448161670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961448161670 is an abundant number, since it is smaller than the sum of its proper divisors (3380368142970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961448161670 is a wasteful number, since it uses less digits than its factorization.

1961448161670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154566506 (or 154566500 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 1961448161670 in words is "one trillion, nine hundred sixty-one billion, four hundred forty-eight million, one hundred sixty-one thousand, six hundred seventy".