752780161 has 16 divisors (see below), whose sum is σ = 900256768. Its totient is φ = 615859200.

The previous prime is 752780113. The next prime is 752780167. The reversal of 752780161 is 161087257.

It is a 4-Lehmer number, since φ(752780161) divides (752780161-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 752780161 - 2⁹ = 752779649 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 752780161.

It is not an unprimeable number, because it can be changed into a prime (752780167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7920 + ... + 39601.

It is an arithmetic number, because the mean of its divisors is an integer number (56266048).

It is a Poulet number, since it divides 2^752780160-1.

Almost surely, 2^752780161 is an apocalyptic number.

752780161 is the 15841-st octagonal number.

It is an amenable number.

752780161 is a deficient number, since it is larger than the sum of its proper divisors (147476607).

752780161 is a wasteful number, since it uses less digits than its factorization.

752780161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47632.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 752780161 is about 27436.8394863548. The cubic root of 752780161 is about 909.6815538335.

The spelling of 752780161 in words is "seven hundred fifty-two million, seven hundred eighty thousand, one hundred sixty-one".