780021350461 has 4 divisors (see below), whose sum is σ = 781584520000. Its totient is φ = 778458180924.

The previous prime is 780021350447. The next prime is 780021350473. The reversal of 780021350461 is 164053120087.

780021350461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 164053120087 = 277 ⋅592249531.

It is a cyclic number.

It is not a de Polignac number, because 780021350461 - 2⁵ = 780021350429 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 780021350461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780021350561) 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, 781584021 + ... + 781585018.

It is an arithmetic number, because the mean of its divisors is an integer number (195396130000).

Almost surely, 2^780021350461 is an apocalyptic number.

It is an amenable number.

780021350461 is a deficient number, since it is larger than the sum of its proper divisors (1563169539).

780021350461 is a wasteful number, since it uses less digits than its factorization.

780021350461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563169538.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 780021350461 in words is "seven hundred eighty billion, twenty-one million, three hundred fifty thousand, four hundred sixty-one".