4015640321 has 8 divisors (see below), whose sum is σ = 5006512704. Its totient is φ = 3129070320.

The previous prime is 4015640287. The next prime is 4015640341. The reversal of 4015640321 is 1230465104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4015640321 - 2⁶ = 4015640257 is a prime.

It is a super-2 number, since 2×4015640321² = 32250734375281966082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4015640341) 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, 26075510 + ... + 26075663.

It is an arithmetic number, because the mean of its divisors is an integer number (625814088).

Almost surely, 2^4015640321 is an apocalyptic number.

It is an amenable number.

4015640321 is a deficient number, since it is larger than the sum of its proper divisors (990872383).

4015640321 is a wasteful number, since it uses less digits than its factorization.

4015640321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52151191.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4015640321 is about 63369.0801653298. The cubic root of 4015640321 is about 1589.4673163845.

The spelling of 4015640321 in words is "four billion, fifteen million, six hundred forty thousand, three hundred twenty-one".