3781599642 has 16 divisors (see below), whose sum is σ = 8403554880. Its totient is φ = 1260533196.

The previous prime is 3781599637. The next prime is 3781599643. The reversal of 3781599642 is 2469951873.

3781599642 is a `hidden beast` number, since 3 + 7 + 8 + 1 + 599 + 6 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 70029623 = 3781599642 / (3 + 7 + 8 + 1 + 5 + 9 + 9 + 6 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (3781599643) 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, 35014758 + ... + 35014865.

It is an arithmetic number, because the mean of its divisors is an integer number (525222180).

Almost surely, 2^3781599642 is an apocalyptic number.

3781599642 is an abundant number, since it is smaller than the sum of its proper divisors (4621955238).

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

3781599642 is a wasteful number, since it uses less digits than its factorization.

3781599642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70029634 (or 70029628 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 3781599642 is about 61494.7123092709. The cubic root of 3781599642 is about 1557.9679384984.

The spelling of 3781599642 in words is "three billion, seven hundred eighty-one million, five hundred ninety-nine thousand, six hundred forty-two".