1961719742 has 16 divisors (see below), whose sum is σ = 3038589312. Its totient is φ = 948879360.

The previous prime is 1961719741. The next prime is 1961719757. The reversal of 1961719742 is 2479171691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961719741) 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, 306398 + ... + 312734.

It is an arithmetic number, because the mean of its divisors is an integer number (189911832).

Almost surely, 2^1961719742 is an apocalyptic number.

1961719742 is a deficient number, since it is larger than the sum of its proper divisors (1076869570).

1961719742 is a wasteful number, since it uses less digits than its factorization.

1961719742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363.

The product of its digits is 190512, while the sum is 47.

The square root of 1961719742 is about 44291.3054899040. The cubic root of 1961719742 is about 1251.8308620062.

The spelling of 1961719742 in words is "one billion, nine hundred sixty-one million, seven hundred nineteen thousand, seven hundred forty-two".