77649048440 has 16 divisors (see below), whose sum is σ = 174710359080. Its totient is φ = 31059619360.

The previous prime is 77649048383. The next prime is 77649048443. The reversal of 77649048440 is 4484094677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77649048443) 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, 970613066 + ... + 970613145.

Almost surely, 2^77649048440 is an apocalyptic number.

It is an amenable number.

77649048440 is an abundant number, since it is smaller than the sum of its proper divisors (97061310640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77649048440 is a wasteful number, since it uses less digits than its factorization.

77649048440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941226222 (or 1941226218 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 77649048440 in words is "seventy-seven billion, six hundred forty-nine million, forty-eight thousand, four hundred forty".