77901563 has 4 divisors (see below), whose sum is σ = 78225048. Its totient is φ = 77578080.

The previous prime is 77901553. The next prime is 77901587. The reversal of 77901563 is 36510977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36510977 = 3467 ⋅10531.

It is a cyclic number.

It is not a de Polignac number, because 77901563 - 2⁴ = 77901547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77901533) 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, 161381 + ... + 161862.

It is an arithmetic number, because the mean of its divisors is an integer number (19556262).

Almost surely, 2^77901563 is an apocalyptic number.

77901563 is a deficient number, since it is larger than the sum of its proper divisors (323485).

77901563 is a wasteful number, since it uses less digits than its factorization.

77901563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323484.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 77901563 is about 8826.1862092299. The cubic root of 77901563 is about 427.0860541716.

The spelling of 77901563 in words is "seventy-seven million, nine hundred one thousand, five hundred sixty-three".