63867551 has 12 divisors (see below), whose sum is σ = 70871976. Its totient is φ = 57507120.

The previous prime is 63867539. The next prime is 63867563. The reversal of 63867551 is 15576836.

It is an interprime number because it is at equal distance from previous prime (63867539) and next prime (63867563).

It is not a de Polignac number, because 63867551 - 2¹⁰ = 63866527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63867499 and 63867508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63867571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10481 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (5905998).

Almost surely, 2^63867551 is an apocalyptic number.

63867551 is a deficient number, since it is larger than the sum of its proper divisors (7004425).

63867551 is a wasteful number, since it uses less digits than its factorization.

63867551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062 (or 5051 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 63867551 is about 7991.7176501676. The cubic root of 63867551 is about 399.7238740133.

The spelling of 63867551 in words is "sixty-three million, eight hundred sixty-seven thousand, five hundred fifty-one".