102406156521 has 16 divisors (see below), whose sum is σ = 137584708800. Its totient is φ = 67749622848.

The previous prime is 102406156513. The next prime is 102406156603. The reversal of 102406156521 is 125651604201.

It is not a de Polignac number, because 102406156521 - 2³ = 102406156513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102406166521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909675 + ... + 1016031.

It is an arithmetic number, because the mean of its divisors is an integer number (8599044300).

Almost surely, 2^102406156521 is an apocalyptic number.

It is an amenable number.

102406156521 is a deficient number, since it is larger than the sum of its proper divisors (35178552279).

102406156521 is a wasteful number, since it uses less digits than its factorization.

102406156521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108808.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 102406156521 in words is "one hundred two billion, four hundred six million, one hundred fifty-six thousand, five hundred twenty-one".