402011515415 has 4 divisors (see below), whose sum is σ = 482413818504. Its totient is φ = 321609212328.

The previous prime is 402011515393. The next prime is 402011515459. The reversal of 402011515415 is 514515110204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402011515415 is a prime.

It is a super-2 number, since 2×402011515415² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40201151537 + ... + 40201151546.

It is an arithmetic number, because the mean of its divisors is an integer number (120603454626).

Almost surely, 2^402011515415 is an apocalyptic number.

402011515415 is a deficient number, since it is larger than the sum of its proper divisors (80402303089).

402011515415 is an equidigital number, since it uses as much as digits as its factorization.

402011515415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80402303088.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 402011515415 its reverse (514515110204), we get a palindrome (916526625619).

The spelling of 402011515415 in words is "four hundred two billion, eleven million, five hundred fifteen thousand, four hundred fifteen".