61262515220 has 12 divisors (see below), whose sum is σ = 128651282004. Its totient is φ = 24505006080.

The previous prime is 61262515211. The next prime is 61262515231. The reversal of 61262515220 is 2251526216.

It can be written as a sum of positive squares in 2 ways, for example, as 24374703376 + 36887811844 = 156124^2 + 192062^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531562861 + ... + 1531562900.

It is an arithmetic number, because the mean of its divisors is an integer number (10720940167).

Almost surely, 2^61262515220 is an apocalyptic number.

It is an amenable number.

61262515220 is an abundant number, since it is smaller than the sum of its proper divisors (67388766784).

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

61262515220 is a wasteful number, since it uses less digits than its factorization.

61262515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063125770 (or 3063125768 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 61262515220 in words is "sixty-one billion, two hundred sixty-two million, five hundred fifteen thousand, two hundred twenty".