1601640742 has 16 divisors (see below), whose sum is σ = 2699756640. Its totient is φ = 707078592.

The previous prime is 1601640731. The next prime is 1601640743. The reversal of 1601640742 is 2470461061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601640743) 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, 1338567 + ... + 1339762.

It is an arithmetic number, because the mean of its divisors is an integer number (168734790).

Almost surely, 2^1601640742 is an apocalyptic number.

1601640742 is a deficient number, since it is larger than the sum of its proper divisors (1098115898).

1601640742 is a wasteful number, since it uses less digits than its factorization.

1601640742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678367.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1601640742 is about 40020.5040198146. The cubic root of 1601640742 is about 1170.0067552633.

The spelling of 1601640742 in words is "one billion, six hundred one million, six hundred forty thousand, seven hundred forty-two".