102649307799 has 4 divisors (see below), whose sum is σ = 136865743736. Its totient is φ = 68432871864.

The previous prime is 102649307791. The next prime is 102649307863. The reversal of 102649307799 is 997703946201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997703946201 = 3 ⋅332567982067.

It is not a de Polignac number, because 102649307799 - 2³ = 102649307791 is a prime.

It is a super-2 number, since 2×102649307799² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102649307791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17108217964 + ... + 17108217969.

It is an arithmetic number, because the mean of its divisors is an integer number (34216435934).

Almost surely, 2^102649307799 is an apocalyptic number.

102649307799 is a deficient number, since it is larger than the sum of its proper divisors (34216435937).

102649307799 is an equidigital number, since it uses as much as digits as its factorization.

102649307799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34216435936.

The product of its (nonzero) digits is 5143824, while the sum is 57.

The spelling of 102649307799 in words is "one hundred two billion, six hundred forty-nine million, three hundred seven thousand, seven hundred ninety-nine".