61249999999 has 8 divisors (see below), whose sum is σ = 62812814400. Its totient is φ = 59690467200.

The previous prime is 61249999991. The next prime is 61250000023. The reversal of 61249999999 is 99999994216.

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

It is a cyclic number.

It is not a de Polignac number, because 61249999999 - 2³ = 61249999991 is a prime.

It is a Duffinian number.

61249999999 is a modest number, since divided by 999999 gives 61249 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61249999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782574 + ... + 857275.

It is an arithmetic number, because the mean of its divisors is an integer number (7851601800).

Almost surely, 2^61249999999 is an apocalyptic number.

61249999999 is a deficient number, since it is larger than the sum of its proper divisors (1562814401).

61249999999 is a wasteful number, since it uses less digits than its factorization.

61249999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640801.

The product of its digits is 229582512, while the sum is 76.

The spelling of 61249999999 in words is "sixty-one billion, two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".