61621252006522 has 24 divisors (see below), whose sum is σ = 100090279931004. Its totient is φ = 28440201838464.

The previous prime is 61621252006519. The next prime is 61621252006543. The reversal of 61621252006522 is 22560025212616.

It can be written as a sum of positive squares in 6 ways, for example, as 4835517438361 + 56785734568161 = 2198981^2 + 7535631^2 .

It is a super-2 number, since 2×61621252006522² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25256398 + ... + 27588550.

Almost surely, 2^{61621252006522} is an apocalyptic number.

61621252006522 is a deficient number, since it is larger than the sum of its proper divisors (38469027924482).

61621252006522 is a wasteful number, since it uses less digits than its factorization.

61621252006522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410354 (or 2410341 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 61621252006522 in words is "sixty-one trillion, six hundred twenty-one billion, two hundred fifty-two million, six thousand, five hundred twenty-two".