4962391661 has 4 divisors (see below), whose sum is σ = 5007918300. Its totient is φ = 4916865024.

The previous prime is 4962391631. The next prime is 4962391667. The reversal of 4962391661 is 1661932694.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2077627561 + 2884764100 = 45581^2 + 53710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4962391661 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 (4962391667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22763156 + ... + 22763373.

It is an arithmetic number, because the mean of its divisors is an integer number (1251979575).

Almost surely, 2^4962391661 is an apocalyptic number.

It is an amenable number.

4962391661 is a deficient number, since it is larger than the sum of its proper divisors (45526639).

4962391661 is a wasteful number, since it uses less digits than its factorization.

4962391661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45526638.

The product of its digits is 419904, while the sum is 47.

The square root of 4962391661 is about 70444.2450523817. The cubic root of 4962391661 is about 1705.6778620023.

The spelling of 4962391661 in words is "four billion, nine hundred sixty-two million, three hundred ninety-one thousand, six hundred sixty-one".