77770074551 has 8 divisors (see below), whose sum is σ = 84899682000. Its totient is φ = 70804366272.

The previous prime is 77770074493. The next prime is 77770074553. The reversal of 77770074551 is 15547007777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77770074551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77770074551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770074553) 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, 40973801 + ... + 40975698.

It is an arithmetic number, because the mean of its divisors is an integer number (10612460250).

Almost surely, 2^77770074551 is an apocalyptic number.

77770074551 is a deficient number, since it is larger than the sum of its proper divisors (7129607449).

77770074551 is a wasteful number, since it uses less digits than its factorization.

77770074551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81949585.

The product of its (nonzero) digits is 1680700, while the sum is 50.

The spelling of 77770074551 in words is "seventy-seven billion, seven hundred seventy million, seventy-four thousand, five hundred fifty-one".