61026021040 has 40 divisors (see below), whose sum is σ = 145720249200. Its totient is φ = 23750666496.

The previous prime is 61026021011. The next prime is 61026021053. The reversal of 61026021040 is 4012062016.

It is a tau number, because it is divible by the number of its divisors (40).

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, 10305490 + ... + 10311409.

It is an arithmetic number, because the mean of its divisors is an integer number (3643006230).

Almost surely, 2^61026021040 is an apocalyptic number.

It is an amenable number.

61026021040 is an abundant number, since it is smaller than the sum of its proper divisors (84694228160).

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

61026021040 is a wasteful number, since it uses less digits than its factorization.

61026021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20616949 (or 20616943 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 61026021040 its reverse (4012062016), we get a palindrome (65038083056).

The spelling of 61026021040 in words is "sixty-one billion, twenty-six million, twenty-one thousand, forty".