61965973042 has 4 divisors (see below), whose sum is σ = 92948959566. Its totient is φ = 30982986520.

The previous prime is 61965973021. The next prime is 61965973051. The reversal of 61965973042 is 24037956916.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56215935801 + 5750037241 = 237099^2 + 75829^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15491493259 + ... + 15491493262.

Almost surely, 2^61965973042 is an apocalyptic number.

61965973042 is a deficient number, since it is larger than the sum of its proper divisors (30982986524).

61965973042 is a wasteful number, since it uses less digits than its factorization.

61965973042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30982986523.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 61965973042 in words is "sixty-one billion, nine hundred sixty-five million, nine hundred seventy-three thousand, forty-two".