61699607963 has 16 divisors (see below), whose sum is σ = 71687524800. Its totient is φ = 52005542400.

The previous prime is 61699607897. The next prime is 61699607971. The reversal of 61699607963 is 36970699616.

It is a happy number.

It is not a de Polignac number, because 61699607963 - 2⁸ = 61699607707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61699607896 and 61699607905.

It is not an unprimeable number, because it can be changed into a prime (61699601963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969583 + ... + 2000663.

It is an arithmetic number, because the mean of its divisors is an integer number (4480470300).

Almost surely, 2^61699607963 is an apocalyptic number.

61699607963 is a deficient number, since it is larger than the sum of its proper divisors (9987916837).

61699607963 is a wasteful number, since it uses less digits than its factorization.

61699607963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35798.

The product of its (nonzero) digits is 19840464, while the sum is 62.

The spelling of 61699607963 in words is "sixty-one billion, six hundred ninety-nine million, six hundred seven thousand, nine hundred sixty-three".