81519301190 has 32 divisors (see below), whose sum is σ = 147105776160. Its totient is φ = 32525337600.

The previous prime is 81519301183. The next prime is 81519301211. The reversal of 81519301190 is 9110391518.

It is a super-2 number, since 2×81519301190² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 19741046 + ... + 19745174.

It is an arithmetic number, because the mean of its divisors is an integer number (4597055505).

Almost surely, 2^81519301190 is an apocalyptic number.

81519301190 is a deficient number, since it is larger than the sum of its proper divisors (65586474970).

81519301190 is a wasteful number, since it uses less digits than its factorization.

81519301190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648.

The product of its (nonzero) digits is 9720, while the sum is 38.

The spelling of 81519301190 in words is "eighty-one billion, five hundred nineteen million, three hundred one thousand, one hundred ninety".