1961738151658 has 16 divisors (see below), whose sum is σ = 2980059264000. Its totient is φ = 968386762512.

The previous prime is 1961738151613. The next prime is 1961738151673. The reversal of 1961738151658 is 8561518371691.

It is a junction number, because it is equal to n+sod(n) for n = 1961738151596 and 1961738151605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1933648 + ... + 2768116.

It is an arithmetic number, because the mean of its divisors is an integer number (186253704000).

Almost surely, 2^{1961738151658} is an apocalyptic number.

1961738151658 is a deficient number, since it is larger than the sum of its proper divisors (1018321112342).

1961738151658 is a wasteful number, since it uses less digits than its factorization.

1961738151658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849429.

The product of its digits is 10886400, while the sum is 61.

The spelling of 1961738151658 in words is "one trillion, nine hundred sixty-one billion, seven hundred thirty-eight million, one hundred fifty-one thousand, six hundred fifty-eight".