10201520642 has 4 divisors (see below), whose sum is σ = 15302280966. Its totient is φ = 5100760320.

The previous prime is 10201520551. The next prime is 10201520683. The reversal of 10201520642 is 24602510201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24602510201 = 11117 ⋅2213053.

It can be written as a sum of positive squares in only one way, i.e., 8686053601 + 1515467041 = 93199^2 + 38929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550380159 + ... + 2550380162.

Almost surely, 2^10201520642 is an apocalyptic number.

10201520642 is a deficient number, since it is larger than the sum of its proper divisors (5100760324).

10201520642 is an equidigital number, since it uses as much as digits as its factorization.

10201520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100760323.

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 10201520642 in words is "ten billion, two hundred one million, five hundred twenty thousand, six hundred forty-two".