1642468725 has 48 divisors (see below), whose sum is σ = 3045608640. Its totient is φ = 867758400.

The previous prime is 1642468717. The next prime is 1642468741. The reversal of 1642468725 is 5278642461.

1642468725 is a `hidden beast` number, since 164 + 2 + 468 + 7 + 25 = 666.

It is not a de Polignac number, because 1642468725 - 2³ = 1642468717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60855 + ... + 83595.

It is an arithmetic number, because the mean of its divisors is an integer number (63450180).

Almost surely, 2^1642468725 is an apocalyptic number.

1642468725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642468725 is a deficient number, since it is larger than the sum of its proper divisors (1403139915).

1642468725 is a wasteful number, since it uses less digits than its factorization.

1642468725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22867 (or 22856 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 1642468725 is about 40527.3824099213. The cubic root of 1642468725 is about 1179.8651394760.

The spelling of 1642468725 in words is "one billion, six hundred forty-two million, four hundred sixty-eight thousand, seven hundred twenty-five".