61623057993 has 32 divisors (see below), whose sum is σ = 98003976192. Its totient is φ = 33675470400.

The previous prime is 61623057919. The next prime is 61623058001. The reversal of 61623057993 is 39975032616.

It is a happy number.

It is not a de Polignac number, because 61623057993 - 2⁸ = 61623057737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61623057913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3328783 + ... + 3347243.

It is an arithmetic number, because the mean of its divisors is an integer number (3062624256).

Almost surely, 2^61623057993 is an apocalyptic number.

It is an amenable number.

61623057993 is a deficient number, since it is larger than the sum of its proper divisors (36380918199).

61623057993 is a wasteful number, since it uses less digits than its factorization.

61623057993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25405.

The product of its (nonzero) digits is 1837080, while the sum is 51.

The spelling of 61623057993 in words is "sixty-one billion, six hundred twenty-three million, fifty-seven thousand, nine hundred ninety-three".