4020061651 has 4 divisors (see below), whose sum is σ = 4023740752. Its totient is φ = 4016382552.

The previous prime is 4020061637. The next prime is 4020061657. The reversal of 4020061651 is 1561600204.

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

It is a cyclic number.

It is not a de Polignac number, because 4020061651 - 2⁷ = 4020061523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020061657) 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, 1837911 + ... + 1840096.

It is an arithmetic number, because the mean of its divisors is an integer number (1005935188).

Almost surely, 2^4020061651 is an apocalyptic number.

4020061651 is a deficient number, since it is larger than the sum of its proper divisors (3679101).

4020061651 is a wasteful number, since it uses less digits than its factorization.

4020061651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679100.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 4020061651 is about 63403.9561147410. The cubic root of 4020061651 is about 1590.0504514403.

Adding to 4020061651 its reverse (1561600204), we get a palindrome (5581661855).

The spelling of 4020061651 in words is "four billion, twenty million, sixty-one thousand, six hundred fifty-one".