611677778950 has 24 divisors (see below), whose sum is σ = 1300252193712. Its totient is φ = 209718095520.

The previous prime is 611677778911. The next prime is 611677778951. The reversal of 611677778950 is 59877776116.

It is a happy number.

It is a super-2 number, since 2×611677778950² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611677778951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873825049 + ... + 873825748.

It is an arithmetic number, because the mean of its divisors is an integer number (54177174738).

Almost surely, 2^611677778950 is an apocalyptic number.

611677778950 is an abundant number, since it is smaller than the sum of its proper divisors (688574414762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611677778950 is a wasteful number, since it uses less digits than its factorization.

611677778950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747650816 (or 1747650811 counting only the distinct ones).

The product of its (nonzero) digits is 31116960, while the sum is 64.

The spelling of 611677778950 in words is "six hundred eleven billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred fifty".