77552641 has 8 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 73928400.

The previous prime is 77552639. The next prime is 77552663. The reversal of 77552641 is 14625577.

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

It is a cyclic number.

It is not a de Polignac number, because 77552641 - 2¹ = 77552639 is a prime.

It is a super-3 number, since 3×77552641³ (a number of 25 digits) contains 333 as substring.

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 77552641.

It is not an unprimeable number, because it can be changed into a prime (77552681) 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, 14635 + ... + 19216.

It is an arithmetic number, because the mean of its divisors is an integer number (10155600).

Almost surely, 2^77552641 is an apocalyptic number.

It is an amenable number.

77552641 is a deficient number, since it is larger than the sum of its proper divisors (3692159).

77552641 is a wasteful number, since it uses less digits than its factorization.

77552641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33959.

The product of its digits is 58800, while the sum is 37.

The square root of 77552641 is about 8806.3977311952. The cubic root of 77552641 is about 426.4474586726.

The spelling of 77552641 in words is "seventy-seven million, five hundred fifty-two thousand, six hundred forty-one".