102154142540 has 24 divisors (see below), whose sum is σ = 217545162912. Its totient is φ = 40286140160.

The previous prime is 102154142539. The next prime is 102154142549. The reversal of 102154142540 is 45241451201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102154142549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35968349 + ... + 35971188.

It is an arithmetic number, because the mean of its divisors is an integer number (9064381788).

Almost surely, 2^102154142540 is an apocalyptic number.

102154142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102154142540 is an abundant number, since it is smaller than the sum of its proper divisors (115391020372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102154142540 is a wasteful number, since it uses less digits than its factorization.

102154142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71939617 (or 71939615 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 102154142540 its reverse (45241451201), we get a palindrome (147395593741).

The spelling of 102154142540 in words is "one hundred two billion, one hundred fifty-four million, one hundred forty-two thousand, five hundred forty".