61531426300 has 36 divisors (see below), whose sum is σ = 133551124056. Its totient is φ = 24607422400.

The previous prime is 61531426273. The next prime is 61531426321. The reversal of 61531426300 is 362413516.

It is a super-2 number, since 2×61531426300² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435435 + ... + 559165.

It is an arithmetic number, because the mean of its divisors is an integer number (3709753446).

Almost surely, 2^61531426300 is an apocalyptic number.

It is an amenable number.

61531426300 is an abundant number, since it is smaller than the sum of its proper divisors (72019697756).

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

61531426300 is a wasteful number, since it uses less digits than its factorization.

61531426300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128718 (or 128711 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 61531426300 its reverse (362413516), we get a palindrome (61893839816).

The spelling of 61531426300 in words is "sixty-one billion, five hundred thirty-one million, four hundred twenty-six thousand, three hundred".