63696855377 has 4 divisors (see below), whose sum is σ = 63698634240. Its totient is φ = 63695076516.

The previous prime is 63696855373. The next prime is 63696855379. The reversal of 63696855377 is 77355869636.

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 63696855377 - 2² = 63696855373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63696855373) 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, 834593 + ... + 907710.

It is an arithmetic number, because the mean of its divisors is an integer number (15924658560).

Almost surely, 2^63696855377 is an apocalyptic number.

It is an amenable number.

63696855377 is a deficient number, since it is larger than the sum of its proper divisors (1778863).

63696855377 is a wasteful number, since it uses less digits than its factorization.

63696855377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778862.

The product of its digits is 171460800, while the sum is 65.

The spelling of 63696855377 in words is "sixty-three billion, six hundred ninety-six million, eight hundred fifty-five thousand, three hundred seventy-seven".