1081756562490 has 80 divisors (see below), whose sum is σ = 3079824605352. Its totient is φ = 271499682816.

The previous prime is 1081756562489. The next prime is 1081756562521. The reversal of 1081756562490 is 942656571801.

It is a happy number.

1081756562490 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 7 + 5 + 6 + 5 + 624 + 9 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1078633876329 + 3122686161 = 1038573^2 + 55881^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39265699 + ... + 39293238.

Almost surely, 2^{1081756562490} is an apocalyptic number.

1081756562490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081756562490 is an abundant number, since it is smaller than the sum of its proper divisors (1998068042862).

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

1081756562490 is a wasteful number, since it uses less digits than its factorization.

1081756562490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78558973 (or 78558964 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 1081756562490 in words is "one trillion, eighty-one billion, seven hundred fifty-six million, five hundred sixty-two thousand, four hundred ninety".