1642431077 has 16 divisors (see below), whose sum is σ = 1893472512. Its totient is φ = 1395532800.

The previous prime is 1642431067. The next prime is 1642431101. The reversal of 1642431077 is 7701342461.

It is a cyclic number.

It is not a de Polignac number, because 1642431077 - 2⁸ = 1642430821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642431017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608543 + ... + 611235.

It is an arithmetic number, because the mean of its divisors is an integer number (118342032).

Almost surely, 2^1642431077 is an apocalyptic number.

It is an amenable number.

1642431077 is a deficient number, since it is larger than the sum of its proper divisors (251041435).

1642431077 is a wasteful number, since it uses less digits than its factorization.

1642431077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 1642431077 is about 40526.9179311726. The cubic root of 1642431077 is about 1179.8561246109.

The spelling of 1642431077 in words is "one billion, six hundred forty-two million, four hundred thirty-one thousand, seventy-seven".