1061261497530 has 128 divisors (see below), whose sum is σ = 3053302560000. Its totient is φ = 260755552512.

The previous prime is 1061261497523. The next prime is 1061261497553. The reversal of 1061261497530 is 357941621601.

1061261497530 is a `hidden beast` number, since 1 + 0 + 6 + 1 + 26 + 1 + 4 + 97 + 530 = 666.

It is a super-2 number, since 2×1061261497530² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1643596 + ... + 2196344.

It is an arithmetic number, because the mean of its divisors is an integer number (23853926250).

Almost surely, 2^{1061261497530} is an apocalyptic number.

1061261497530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1061261497530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526651280000).

1061261497530 is an abundant number, since it is smaller than the sum of its proper divisors (1992041062470).

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

1061261497530 is a wasteful number, since it uses less digits than its factorization.

1061261497530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553325 (or 553319 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 1061261497530 in words is "one trillion, sixty-one billion, two hundred sixty-one million, four hundred ninety-seven thousand, five hundred thirty".