102145472451 has 48 divisors (see below), whose sum is σ = 170571443328. Its totient is φ = 58214572800.

The previous prime is 102145472447. The next prime is 102145472479. The reversal of 102145472451 is 154274541201.

102145472451 is a `hidden beast` number, since 1 + 0 + 2 + 145 + 472 + 45 + 1 = 666.

It is not a de Polignac number, because 102145472451 - 2² = 102145472447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102145472441) 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 47 ways as a sum of consecutive naturals, for example, 1972156 + ... + 2023286.

It is an arithmetic number, because the mean of its divisors is an integer number (3553571736).

Almost surely, 2^102145472451 is an apocalyptic number.

102145472451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102145472451 is a deficient number, since it is larger than the sum of its proper divisors (68425970877).

102145472451 is a wasteful number, since it uses less digits than its factorization.

102145472451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52352 (or 52349 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 102145472451 in words is "one hundred two billion, one hundred forty-five million, four hundred seventy-two thousand, four hundred fifty-one".