102405153049 has 4 divisors (see below), whose sum is σ = 102424076836. Its totient is φ = 102386229264.

The previous prime is 102405153031. The next prime is 102405153077. The reversal of 102405153049 is 940351504201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940351504201 = 1291 ⋅728390011.

It can be written as a sum of positive squares in 2 ways, for example, as 34886768400 + 67518384649 = 186780^2 + 259843^2 .

It is a cyclic number.

It is not a de Polignac number, because 102405153049 - 2⁹ = 102405152537 is a prime.

It is a super-2 number, since 2×102405153049² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102405153089) 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, 9453774 + ... + 9464599.

It is an arithmetic number, because the mean of its divisors is an integer number (25606019209).

Almost surely, 2^102405153049 is an apocalyptic number.

It is an amenable number.

102405153049 is a deficient number, since it is larger than the sum of its proper divisors (18923787).

102405153049 is an equidigital number, since it uses as much as digits as its factorization.

102405153049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18923786.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 102405153049 in words is "one hundred two billion, four hundred five million, one hundred fifty-three thousand, forty-nine".