61953660842 has 8 divisors (see below), whose sum is σ = 95442126276. Its totient is φ = 30139618752.

The previous prime is 61953660803. The next prime is 61953660851. The reversal of 61953660842 is 24806635916.

It can be written as a sum of positive squares in 2 ways, for example, as 61057915801 + 895745041 = 247099^2 + 29929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418605743 + ... + 418605890.

Almost surely, 2^61953660842 is an apocalyptic number.

61953660842 is a deficient number, since it is larger than the sum of its proper divisors (33488465434).

61953660842 is a wasteful number, since it uses less digits than its factorization.

61953660842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837211672.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 61953660842 in words is "sixty-one billion, nine hundred fifty-three million, six hundred sixty thousand, eight hundred forty-two".