780858503961 has 32 divisors (see below), whose sum is σ = 1085345963520. Its totient is φ = 498760416000.

The previous prime is 780858503921. The next prime is 780858503963. The reversal of 780858503961 is 169305858087.

It is not a de Polignac number, because 780858503961 - 2²¹ = 780856406809 is a prime.

It is a super-2 number, since 2×780858503961² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 780858503895 and 780858503904.

It is not an unprimeable number, because it can be changed into a prime (780858503963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7237311 + ... + 7344411.

It is an arithmetic number, because the mean of its divisors is an integer number (33917061360).

Almost surely, 2^780858503961 is an apocalyptic number.

It is an amenable number.

780858503961 is a deficient number, since it is larger than the sum of its proper divisors (304487459559).

780858503961 is a wasteful number, since it uses less digits than its factorization.

780858503961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107777.

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 780858503961 in words is "seven hundred eighty billion, eight hundred fifty-eight million, five hundred three thousand, nine hundred sixty-one".