201512261663513 has 4 divisors (see below), whose sum is σ = 201675959683968. Its totient is φ = 201348563643060.

The previous prime is 201512261663491. The next prime is 201512261663639. The reversal of 201512261663513 is 315366162215102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201512261663513 is a prime.

It is a super-2 number, since 2×201512261663513² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201512261663813) 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, 81849008381 + ... + 81849010842.

It is an arithmetic number, because the mean of its divisors is an integer number (50418989920992).

Almost surely, 2^{201512261663513} is an apocalyptic number.

It is an amenable number.

201512261663513 is a deficient number, since it is larger than the sum of its proper divisors (163698020455).

201512261663513 is a wasteful number, since it uses less digits than its factorization.

201512261663513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163698020454.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 201512261663513 in words is "two hundred one trillion, five hundred twelve billion, two hundred sixty-one million, six hundred sixty-three thousand, five hundred thirteen".