72780891202 has 32 divisors (see below), whose sum is σ = 115501018752. Its totient is φ = 34327079424.

The previous prime is 72780891149. The next prime is 72780891203. The reversal of 72780891202 is 20219808727.

It is a happy number.

It is a super-2 number, since 2×72780891202² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (72780891203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1233928 + ... + 1291564.

It is an arithmetic number, because the mean of its divisors is an integer number (3609406836).

Almost surely, 2^72780891202 is an apocalyptic number.

72780891202 is a deficient number, since it is larger than the sum of its proper divisors (42720127550).

72780891202 is a wasteful number, since it uses less digits than its factorization.

72780891202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58042.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 72780891202 in words is "seventy-two billion, seven hundred eighty million, eight hundred ninety-one thousand, two hundred two".