63525897906837 has 4 divisors (see below), whose sum is σ = 84701197209120. Its totient is φ = 42350598604556.

The previous prime is 63525897906781. The next prime is 63525897906839. The reversal of 63525897906837 is 73860979852536.

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 not a de Polignac number, because 63525897906837 - 2²⁰ = 63525896858261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63525897906839) 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, 10587649651137 + ... + 10587649651142.

It is an arithmetic number, because the mean of its divisors is an integer number (21175299302280).

Almost surely, 2^{63525897906837} is an apocalyptic number.

It is an amenable number.

63525897906837 is a deficient number, since it is larger than the sum of its proper divisors (21175299302283).

63525897906837 is a wasteful number, since it uses less digits than its factorization.

63525897906837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21175299302282.

The product of its (nonzero) digits is 4115059200, while the sum is 78.

The spelling of 63525897906837 in words is "sixty-three trillion, five hundred twenty-five billion, eight hundred ninety-seven million, nine hundred six thousand, eight hundred thirty-seven".