61111397690 has 32 divisors (see below), whose sum is σ = 126057475584. Its totient is φ = 20895379200.

The previous prime is 61111397687. The next prime is 61111397701. The reversal of 61111397690 is 9679311116.

It is a super-2 number, since 2×61111397690² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1163711 + ... + 1215090.

It is an arithmetic number, because the mean of its divisors is an integer number (3939296112).

Almost surely, 2^61111397690 is an apocalyptic number.

61111397690 is an abundant number, since it is smaller than the sum of its proper divisors (64946077894).

61111397690 is a wasteful number, since it uses less digits than its factorization.

61111397690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379182.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 61111397690 in words is "sixty-one billion, one hundred eleven million, three hundred ninety-seven thousand, six hundred ninety".