861749292476 has 12 divisors (see below), whose sum is σ = 1560063374520. Its totient is φ = 416016899760.

The previous prime is 861749292473. The next prime is 861749292553. The reversal of 861749292476 is 674292947168.

It is a super-2 number, since 2×861749292476² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861749292473) 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, 3714436490 + ... + 3714436721.

It is an arithmetic number, because the mean of its divisors is an integer number (130005281210).

Almost surely, 2^861749292476 is an apocalyptic number.

It is an amenable number.

861749292476 is a deficient number, since it is larger than the sum of its proper divisors (698314082044).

861749292476 is a wasteful number, since it uses less digits than its factorization.

861749292476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428873244 (or 7428873242 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 65.

The spelling of 861749292476 in words is "eight hundred sixty-one billion, seven hundred forty-nine million, two hundred ninety-two thousand, four hundred seventy-six".