61009191428 has 24 divisors (see below), whose sum is σ = 108710229600. Its totient is φ = 29950407488.

The previous prime is 61009191427. The next prime is 61009191461. The reversal of 61009191428 is 82419190016.

It is not an unprimeable number, because it can be changed into a prime (61009191427) 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, 31151 + ... + 350697.

It is an arithmetic number, because the mean of its divisors is an integer number (4529592900).

Almost surely, 2^61009191428 is an apocalyptic number.

It is an amenable number.

61009191428 is a deficient number, since it is larger than the sum of its proper divisors (47701038172).

61009191428 is a wasteful number, since it uses less digits than its factorization.

61009191428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320419 (or 320417 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 61009191428 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred twenty-eight".