780736725 has 60 divisors (see below), whose sum is σ = 1509162336. Its totient is φ = 398265120.

The previous prime is 780736709. The next prime is 780736727. The reversal of 780736725 is 527637087.

It is not a de Polignac number, because 780736725 - 2⁴ = 780736709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780736727) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 38194 + ... + 54956.

Almost surely, 2^780736725 is an apocalyptic number.

780736725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

780736725 is a deficient number, since it is larger than the sum of its proper divisors (728425611).

780736725 is a wasteful number, since it uses less digits than its factorization.

780736725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808 (or 16794 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 780736725 is about 27941.6664678397. Note that the first 3 decimals coincide. The cubic root of 780736725 is about 920.8061322041.

It can be divided in two parts, 780 and 736725, that added together give a triangular number (737505 = T₁₂₁₄).

The spelling of 780736725 in words is "seven hundred eighty million, seven hundred thirty-six thousand, seven hundred twenty-five".