61520411490 has 16 divisors (see below), whose sum is σ = 147648987648. Its totient is φ = 16405443056.

The previous prime is 61520411489. The next prime is 61520411507. The reversal of 61520411490 is 9411402516.

It is a super-2 number, since 2×61520411490² (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 7 ways as a sum of consecutive naturals, for example, 1025340162 + ... + 1025340221.

It is an arithmetic number, because the mean of its divisors is an integer number (9228061728).

Almost surely, 2^61520411490 is an apocalyptic number.

61520411490 is an abundant number, since it is smaller than the sum of its proper divisors (86128576158).

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

61520411490 is a wasteful number, since it uses less digits than its factorization.

61520411490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050680393.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 61520411490 in words is "sixty-one billion, five hundred twenty million, four hundred eleven thousand, four hundred ninety".