1642477540 has 48 divisors (see below), whose sum is σ = 3765553344. Its totient is φ = 596822400.

The previous prime is 1642477537. The next prime is 1642477561. The reversal of 1642477540 is 457742461.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1642477493 and 1642477502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514750 + ... + 517930.

It is an arithmetic number, because the mean of its divisors is an integer number (78449028).

Almost surely, 2^1642477540 is an apocalyptic number.

1642477540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642477540 is an abundant number, since it is smaller than the sum of its proper divisors (2123075804).

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

1642477540 is a wasteful number, since it uses less digits than its factorization.

1642477540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5548 (or 5546 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 1642477540 is about 40527.4911634066. The cubic root of 1642477540 is about 1179.8672502199.

The spelling of 1642477540 in words is "one billion, six hundred forty-two million, four hundred seventy-seven thousand, five hundred forty".