61000101550 has 12 divisors (see below), whose sum is σ = 113460188976. Its totient is φ = 24400040600.

The previous prime is 61000101451. The next prime is 61000101551. The reversal of 61000101550 is 5510100016.

It is a super-2 number, since 2×61000101550² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000101551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 610000966 + ... + 610001065.

It is an arithmetic number, because the mean of its divisors is an integer number (9455015748).

Almost surely, 2^61000101550 is an apocalyptic number.

61000101550 is a deficient number, since it is larger than the sum of its proper divisors (52460087426).

61000101550 is a wasteful number, since it uses less digits than its factorization.

61000101550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220002043 (or 1220002038 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 61000101550 its reverse (5510100016), we get a palindrome (66510201566).

The spelling of 61000101550 in words is "sixty-one billion, one hundred one thousand, five hundred fifty".