261515026270 has 16 divisors (see below), whose sum is σ = 470777609088. Its totient is φ = 104594774560.

The previous prime is 261515026237. The next prime is 261515026273. The reversal of 261515026270 is 72620515162.

It is a super-2 number, since 2×261515026270² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261515026273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306414 + ... + 1493233.

It is an arithmetic number, because the mean of its divisors is an integer number (29423600568).

Almost surely, 2^261515026270 is an apocalyptic number.

261515026270 is a deficient number, since it is larger than the sum of its proper divisors (209262582818).

261515026270 is a wasteful number, since it uses less digits than its factorization.

261515026270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808995.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 261515026270 in words is "two hundred sixty-one billion, five hundred fifteen million, twenty-six thousand, two hundred seventy".