63451947156 has 24 divisors (see below), whose sum is σ = 159443354784. Its totient is φ = 19523676000.

The previous prime is 63451947131. The next prime is 63451947157. The reversal of 63451947156 is 65174915436.

It is a super-2 number, since 2×63451947156² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63451947099 and 63451947108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63451947157) 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, 203371470 + ... + 203371781.

It is an arithmetic number, because the mean of its divisors is an integer number (6643473116).

Almost surely, 2^63451947156 is an apocalyptic number.

It is an amenable number.

63451947156 is an abundant number, since it is smaller than the sum of its proper divisors (95991407628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63451947156 is a wasteful number, since it uses less digits than its factorization.

63451947156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406743271 (or 406743269 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 63451947156 in words is "sixty-three billion, four hundred fifty-one million, nine hundred forty-seven thousand, one hundred fifty-six".