77775630501 has 4 divisors (see below), whose sum is σ = 103700840672. Its totient is φ = 51850420332.

The previous prime is 77775630481. The next prime is 77775630529. The reversal of 77775630501 is 10503657777.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10503657777 = 3 ⋅3501219259.

It is not a de Polignac number, because 77775630501 - 2¹¹ = 77775628453 is a prime.

It is a super-2 number, since 2×77775630501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77775630901) 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, 12962605081 + ... + 12962605086.

It is an arithmetic number, because the mean of its divisors is an integer number (25925210168).

Almost surely, 2^77775630501 is an apocalyptic number.

It is an amenable number.

77775630501 is a deficient number, since it is larger than the sum of its proper divisors (25925210171).

77775630501 is a wasteful number, since it uses less digits than its factorization.

77775630501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25925210170.

The product of its (nonzero) digits is 1080450, while the sum is 48.

The spelling of 77775630501 in words is "seventy-seven billion, seven hundred seventy-five million, six hundred thirty thousand, five hundred one".