61621252006526 has 4 divisors (see below), whose sum is σ = 92431878009792. Its totient is φ = 30810626003262.

The previous prime is 61621252006519. The next prime is 61621252006543. The reversal of 61621252006526 is 62560025212616.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×61621252006526² (a number of 28 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 as a sum of consecutive naturals, namely, 15405313001630 + ... + 15405313001633.

It is an arithmetic number, because the mean of its divisors is an integer number (23107969502448).

Almost surely, 2^{61621252006526} is an apocalyptic number.

61621252006526 is a deficient number, since it is larger than the sum of its proper divisors (30810626003266).

61621252006526 is a wasteful number, since it uses less digits than its factorization.

61621252006526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30810626003265.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 61621252006526 in words is "sixty-one trillion, six hundred twenty-one billion, two hundred fifty-two million, six thousand, five hundred twenty-six".