61009191436 has 12 divisors (see below), whose sum is σ = 107355954160. Its totient is φ = 30336061680.

The previous prime is 61009191427. The next prime is 61009191461. The reversal of 61009191436 is 63419190016.

It is a happy number.

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, 42132696 + ... + 42134143.

Almost surely, 2^61009191436 is an apocalyptic number.

It is an amenable number.

61009191436 is a deficient number, since it is larger than the sum of its proper divisors (46346762724).

61009191436 is a wasteful number, since it uses less digits than its factorization.

61009191436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84267024 (or 84267022 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 61009191436 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred thirty-six".